---
product_id: 3447599
title: "401SM Micro Adjustable Torque Screwdriver; Range 5 to 40-Inch Pounds, 1/4-Inch"
brand: "cdi torque products"
price: "KSh67682"
currency: KES
in_stock: null
reviews_count: 7
category: "Cdi Torque Products"
url: https://www.desertcart.co.ke/products/3447599-401sm-micro-adjustable-torque-screwdriver-range-5-to-40-inch
store_origin: KE
region: Kenya
---

# Precise micro-adjustable settings Torque range 5-40 in.lbs Strong magnetic 1/4-inch hex bit holder 401SM Micro Adjustable Torque Screwdriver; Range 5 to 40-Inch Pounds, 1/4-Inch

**Brand:** cdi torque products
**Price:** KSh67682
**Availability:** ❌ Out of Stock

## Summary

> ⚙️ Master Every Screw with Micro Precision and Unmatched Reliability

## Quick Answers

- **What is this?** 401SM Micro Adjustable Torque Screwdriver; Range 5 to 40-Inch Pounds, 1/4-Inch by cdi torque products
- **How much does it cost?** KSh67682 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/3447599-401sm-micro-adjustable-torque-screwdriver-range-5-to-40-inch)

## Best For

- cdi torque products enthusiasts

## Why This Product

- Trusted cdi torque products brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Adjustments:** Unique pull-to-unlock knob with positive locking and easy-to-read window scale guarantees quick, accurate torque changes without accidental slips.
- • **No More Over-tightening:** Innovative cam-over design prevents damage by automatically stopping torque once the set limit is reached.
- • **Built to Last a Lifetime:** Robust metal construction with a polished finish offers durability and a premium feel that stands up to professional use.
- • **Precision at Your Fingertips:** Micro-adjustable torque settings in 1 in.lb increments ensure flawless control for delicate electronics and instrument assembly.
- • **Magnetic Bit Holder for Versatility:** Universal 1/4-inch hex drive with a strong earth magnet keeps bits secure, adapting seamlessly to any small machine part or screw.

## Overview

The CDI Micro Adjustable Torque Screwdriver (401SM) delivers professional-grade precision with a torque range of 5-40 inch pounds, perfect for electronics and instrument assembly. Featuring a durable metal build, a cam-over design to prevent over-tightening, and a magnetic 1/4-inch hex bit holder, it offers effortless, accurate torque adjustments via a unique locking knob. Trusted since 1968 and ISO 9001 certified, this tool combines longevity, reliability, and ease of use—making it an essential for meticulous professionals who demand flawless results every time.

## Description

Product Description CDI Torque Micro-Adjustable Torque Screwdrivers offer versatility for applications that require more than one torque value. These torque screwdrivers are particularly suited for the electronics industry and for instrument assembly work. A simple, cam-over design prevents over-tightening and possible damage to components. Torque settings are easily and accurately changed with a unique adjusting knob and easy-to-read window scale. Adjusting the screwdriver is simple. Just pull out the adjusting knob to unlock, turn to the desired setting, then push the knob in until it clicks! Positive locking knob makes accidental setting changes impossible. Automatic lock in counterclockwise direction makes fastener removal a snap. CDI was founded in 1968 and over the years has developed into a world class torque products manufacturing company. The company earned its ISO 9001 International Quality System Certification in 1998, demonstrating a commitment to provide our customers with the highest quality torque measurement and torque limiting devices in the world. CDI has long been a major innovator and leader in electronic torque measurement and torque calibration equipment. From the Manufacturer This CDI Torque micro adjustable torque screwdriver offer versatility for applications that require more than one torque value. This torque screwdriver is particularly suited for the electronics industry and for instrument assembly work. A simple, cam over design prevents over tightening and possible damage to components. Torque settings are easily and accurately changed with a unique adjusting knob and easy to read window scale. Adjusting the screwdriver is simple, just pull out the adjusting knob to unlock, turn to the desired setting, then push the knob in until it clicks. The positive locking knob makes accidental setting changes impossible. The automatic lock in counterclockwise direction makes fastener removal a snap. It has a universal 1/4-Inch hex bit holder with a strong earth magnet and has a torque range of 5 to 40-Inch pounds.

Review: GREAT Torque Wrench/Screwdriver At A GREAT Price - This CDI micro torque screwdriver is a product distributed through (besides desertcart) Snap-On. This is one of those tools that I don't use that often, but when its needed it is Really needed. Before I bought this item a little over a year ago I did quite a bit of on-line research and discovered that this CDI tool was literally the "only game in town" in terms of accuracy and reliability. The only other contender that even came close (but not very close) was a torque screwdriver sold by Brownells. Since I do not have a calibration lab I went by the accounts of multiple on line sources, and would suggest that you might do the same...things might have changed in the past year. desertcart had the best IN STOCK price I was able to find a year ago. I do my own gunsmithing and use this tool whenever a precise amount of torque is required per a manufacturers specifications. The torque settings are easy to see and adjust within one inch pound increments. The tool accepts regular screwdriver type bits, and therefore will accept just about anything used to tighten small machine parts. So whether you are tightening a screw or a nut (or something in between), and you have the bit to fit your application, this will do the job for you. The build quality on the tool is excellent. It has the heft of a solid little machine and the handle affords a positive grip that lets you apply the downward pressure necessary to keep your bit solidly on the screw and thus avoid any slippage that could mar your workpiece. As far as I can tell (without a calibration lab) this tool gives the proper, repeatable result. I have not stripped a screw or experienced a malfunction of any sort connected with the use of this item. I am very picky when it comes to tools and machines...I earned a living most of my life as a clockmaker specializing in the restoration of antique clocks. These days it is difficult/impossible to acquire high quality tools at a reasonable price. This CDI torque screwdriver is a rare exception in a world of shoddy tools that simply don't measure up to any standard of quality. I believe the reviewer that downgraded this $100+ tool should look toward the Much More Costly torque devices that are intended for 24/7 usage. Under "normal" use I would expect this tool to last the craftsman a lifetime. Kudos to desertcart for making this reliable, high quality tool available to the workman at a good price.
Review: Excellent Micro Adjustable Torque Screwdriver - When considering this tool to purchase - it should be noted that when you are using a tool 24 hours on all shifts (sounds like 24x7) - you also are probably using it more than just once each hour. Once each hour would result in a 5,000 use cycle occurring every 208 days. However, in a busy industrial environment - using this tool just twice each hour - results in 5000 cycles every 104 days. Essentially - every 90 days. You also have the fact that using any torque wrench in the upper or lower ends - decreases the life of said wrench. All of this information is readily available from CDI. The following are quotes from them as to the care of their tools and torque wrenches in general: "To determine which torque wrench capacity is best suited for an application, many factors must be considered. However, as a recommendation, use a torque wrench in the middle 50% of the overall capacity of the tool. This will result in longer tool life, ease of use for the operator and increased accuracy from "clicker" type torque wrenches Torque wrenches should be "exercised" a minimum of three times at 100% of full scale before use Torque wrenches will last longer if reasonable care is taken. Always unwind handle to the lowest setting after each use. Do not attempt to lubricate the internal torque mechanism. Clean torque wrench by wiping, do not immerse. The wrench should be sent to a qualified calibration lab once every year or every 5000 cycles for re-calibration" The instructions for this specific micro adjustable torque screwdriver (401sm) - state to have it calibrated and gone through every 5,000 cycles - or one year - whichever comes first. ALL torque wrenches have useful life cycles. CDI is at least being honest - and putting in print - the life cycle and service requirements. If you use this tool only 3 times each hour - at various settings - you should have it serviced every 69 days minimum. This is just part of the cost of doing business and quality work. I have owned this tool for quite a number of years (just purchasing another one); and find it extremely adequate for small screws, and misc. fasteners without a lot of mass - which require a torque value; etc. With a very long life span. Easy to grip, very visible (bright blue), and easy to use. An excellent tool with excellent cditorque com support.

## Features

- metal, plastic
- Imported
- This Product Is Easy To Use
- Adjustable Models Offer Versatility For Applications That Require More Than One Torque Value
- These Torque Screwdrivers Are Particularly Suited For The Electronics Industry And For Instrument Assembly Work
- A Simple, Cam Over Design Prevents Over-tightening And Possible Damage To Components

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001F7VJIO |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #129,276 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #247 in Torque Wrenches |
| Brand | CDI TORQUE PRODUCTS |
| Color | Blue |
| Customer Reviews | 4.6 4.6 out of 5 stars (261) |
| Date First Available | November 19, 2003 |
| Finish | Polished |
| Global Trade Identification Number | 00662459926968 |
| Head Style | Hex |
| Included Components | Certificate of Calibration, Plastic Case |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 11.2 ounces |
| Item dimensions L x W x H | 8.5 x 1.5 x 1.5 inches |
| Item model number | 401SM |
| Manufacturer | CDI Torque |
| Material | Metal |
| Measurement System | Imperial |
| Model Name | Micro Adjustable Torque Screwdriver |
| Number Of Pieces | 1 |
| Number of Items | 1 |
| Part Number | 401SM |
| Pattern | Screwdriver |
| Power Source | Hand Powered |
| Product Dimensions | 8.5 x 1.5 x 1.5 inches |
| Size | 1/4-Inch |
| Style | 5-40 in.lbs |
| Torque | 40 Inch Pounds |
| UPC | 662459926968 787721588474 |
| Warranty Description | Limited Warranty: Snap-on Industrial Brands warrants that CDI Torque products shall be free from defects in workmanship and materials for the usable life of the product. |

## Product Details

- **Brand:** CDI TORQUE PRODUCTS
- **Color:** Blue
- **Head Style:** Hex
- **Material:** Metal
- **Number of Items:** 1

## Images

![401SM Micro Adjustable Torque Screwdriver; Range 5 to 40-Inch Pounds, 1/4-Inch - Image 1](https://m.media-amazon.com/images/I/61mVuloMHGL.jpg)
![401SM Micro Adjustable Torque Screwdriver; Range 5 to 40-Inch Pounds, 1/4-Inch - Image 2](https://m.media-amazon.com/images/I/41RvOWOVarL.jpg)
![401SM Micro Adjustable Torque Screwdriver; Range 5 to 40-Inch Pounds, 1/4-Inch - Image 3](https://m.media-amazon.com/images/I/61NuPk3rtuL.jpg)
![401SM Micro Adjustable Torque Screwdriver; Range 5 to 40-Inch Pounds, 1/4-Inch - Image 4](https://m.media-amazon.com/images/I/516ReXoz7HL.jpg)
![401SM Micro Adjustable Torque Screwdriver; Range 5 to 40-Inch Pounds, 1/4-Inch - Image 5](https://m.media-amazon.com/images/I/61ZPFn76ulL.jpg)

## Available Options

This product comes in different **Pattern, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ GREAT Torque Wrench/Screwdriver At A GREAT Price
*by L***O on January 14, 2013*

This CDI micro torque screwdriver is a product distributed through (besides Amazon) Snap-On. This is one of those tools that I don't use that often, but when its needed it is Really needed. Before I bought this item a little over a year ago I did quite a bit of on-line research and discovered that this CDI tool was literally the "only game in town" in terms of accuracy and reliability. The only other contender that even came close (but not very close) was a torque screwdriver sold by Brownells. Since I do not have a calibration lab I went by the accounts of multiple on line sources, and would suggest that you might do the same...things might have changed in the past year. Amazon had the best IN STOCK price I was able to find a year ago. I do my own gunsmithing and use this tool whenever a precise amount of torque is required per a manufacturers specifications. The torque settings are easy to see and adjust within one inch pound increments. The tool accepts regular screwdriver type bits, and therefore will accept just about anything used to tighten small machine parts. So whether you are tightening a screw or a nut (or something in between), and you have the bit to fit your application, this will do the job for you. The build quality on the tool is excellent. It has the heft of a solid little machine and the handle affords a positive grip that lets you apply the downward pressure necessary to keep your bit solidly on the screw and thus avoid any slippage that could mar your workpiece. As far as I can tell (without a calibration lab) this tool gives the proper, repeatable result. I have not stripped a screw or experienced a malfunction of any sort connected with the use of this item. I am very picky when it comes to tools and machines...I earned a living most of my life as a clockmaker specializing in the restoration of antique clocks. These days it is difficult/impossible to acquire high quality tools at a reasonable price. This CDI torque screwdriver is a rare exception in a world of shoddy tools that simply don't measure up to any standard of quality. I believe the reviewer that downgraded this $100+ tool should look toward the Much More Costly torque devices that are intended for 24/7 usage. Under "normal" use I would expect this tool to last the craftsman a lifetime. Kudos to Amazon for making this reliable, high quality tool available to the workman at a good price.

### ⭐⭐⭐⭐⭐ Excellent Micro Adjustable Torque Screwdriver
*by D***. on December 19, 2012*

When considering this tool to purchase - it should be noted that when you are using a tool 24 hours on all shifts (sounds like 24x7) - you also are probably using it more than just once each hour. Once each hour would result in a 5,000 use cycle occurring every 208 days. However, in a busy industrial environment - using this tool just twice each hour - results in 5000 cycles every 104 days. Essentially - every 90 days. You also have the fact that using any torque wrench in the upper or lower ends - decreases the life of said wrench. All of this information is readily available from CDI. The following are quotes from them as to the care of their tools and torque wrenches in general: "To determine which torque wrench capacity is best suited for an application, many factors must be considered. However, as a recommendation, use a torque wrench in the middle 50% of the overall capacity of the tool. This will result in longer tool life, ease of use for the operator and increased accuracy from "clicker" type torque wrenches Torque wrenches should be "exercised" a minimum of three times at 100% of full scale before use Torque wrenches will last longer if reasonable care is taken. Always unwind handle to the lowest setting after each use. Do not attempt to lubricate the internal torque mechanism. Clean torque wrench by wiping, do not immerse. The wrench should be sent to a qualified calibration lab once every year or every 5000 cycles for re-calibration" The instructions for this specific micro adjustable torque screwdriver (401sm) - state to have it calibrated and gone through every 5,000 cycles - or one year - whichever comes first. ALL torque wrenches have useful life cycles. CDI is at least being honest - and putting in print - the life cycle and service requirements. If you use this tool only 3 times each hour - at various settings - you should have it serviced every 69 days minimum. This is just part of the cost of doing business and quality work. I have owned this tool for quite a number of years (just purchasing another one); and find it extremely adequate for small screws, and misc. fasteners without a lot of mass - which require a torque value; etc. With a very long life span. Easy to grip, very visible (bright blue), and easy to use. An excellent tool with excellent cditorque com support.

### ⭐⭐⭐⭐⭐ Review
*by S***E on December 13, 2023*

Excellent quality torque wrench for spaces too tight for a ratchet style torque wrench.

## Frequently Bought Together

- CDI Micro Adjustable Torque Screwdriver, 1/4 Inch Hex Drive, Range 5-40 In Lbs (401SM)
- CDI 3/8 Inch Drive Adjustable Click Torque Wrench, Range 30-250 In Lbs / 4-27.7 Nm (2502MRMH)
- CDI 3/8 Inch Drive Adjustable Click Torque Wrench, Range 5-75 Ft Lbs / 10.2-98.3 Nm (752MFRMH)

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---

*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-03-18*