Reset-able Mechanical Counter 5 Digit with Reset Lever. Original for a Walking Tape Measure

OPERATIONAL LIMITATIONS AND PARAMETERS:This tally counter does not register counts with a continuous 360 degree circular motion, but rather a 45 degree partial clockwise rotation that registers a reliable count and prompts the user to let the handle return to position before allowing the next count. It is possible to hack this device to count with partial strokes, but doing so can often result in an incomplete/half count, so for the most reliable results always make a full stroke when counting. This does not mean by any stretch of the imagination that this tally counter is slow: I've conducted a number of tests to see how many counts I can reach in 60 seconds using this tally counter and I've always counted between 230 and 250 each time (so yes, up to 4 counts per second).Each count will produce a tangible and audible (I'd say probably under 15dB) click upon actuation, so if you have to count with this blind, it is certainly possible to do so in most circumstances. The quick reset button makes a very quiet sound upon resetting (under 5dB) and may have to be pressed twice if you don't push it far enough down to completely actuate it the first time during any reset.The handle is removable and cannot be secured to the counting fulcrum by any conventional means since it doesn't provide enough room to secure something akin to a washer and nut. Some may view this as a serious downside to this tally counter, but I see more benefits than disadvantages to this feature:1. Being able to remove the counting lever ensures that the tally counter cannot engage/count while being carried around. If you ever attempt to count without the handle by using just your bare hands, you'll understand exactly what I'm talking about. Only the handle or something comparable such as pliers are capable of ensuring full operation of the tally counter.2. Being able to remove the handle means that you can more easily store it or place it in your pocket and reattach the handle when you're ready to use it.3. You can take advantage of the removable handle in the way that one would safeguard a key to a safe: Keeping the handle on your person or in a secure location away from the tally counter means that only you are likely to be able to operate the tally counter should you be separated from it for any length of time.4. If you remove the standard flat head screw from the counting lever, you can easily fit a military dog tag chain in the opening and wear it around your neck like a safe key and even operate the tally counter with the chain still attached.I should also note that the counting lever has never fallen off during a count (even during the counting tests I performed, which were difficult to accomplish due to my extremely erratic movements).MATERIALS AND CONSTRUCTION:*I'm not sure if this will be immediately obvious to everyone from the image provided, but the counting lever is on the left side of the device and the reset button is on the right side of the device.*The counting handle is a solid piece of metal (probably steel). The counting fulcrum is metal as well (also probably steel).*The casing around the counting fulcrum is plastic, but is extremely sturdy.*Also, I'd like to note that I did not receive the black extension to the counting lever visible in the image provided. However, I don't know whether or not such a component was intended to be sold with this product. That said, if or when I buy another, I will note whether or not such a component is included and update this part of my review accordingly.The most remarkable feature of this tally counter's construction is the fact that the majority of the outside shell is composed of a metal (probably steel, but it's just an educated guess) that is at least one millimeter thick throughout the exterior of the device. The screws that hold the metal shell together are internal and the counter is for the most part a solid and extremely sturdy device that could take a great deal of abuse as long its few vulnerable areas are avoided.The only considerable structural weaknesses of this tally counter are the thin plastic pane, which has blinders to make reading the count easier and the reset button itself. Thus far, the reset button has not failed me, but if you decide to purchase this item I advise treating it as you would treat a newborn child (unless of course you eat babies or something) just to be on the safe side.Thankfully there is a very sturdy guard around the reset button to protect it from any harm that may come from its left. Only small areas of the inner plastic shell are visible (and touchable) through the external metal shell via openings that are about 1 centimeter at the widest points.There is a plate of metal at the bottom with which the tally counter can be mounted with 4 openings for screws (standard screws should fit, the diameter is 4mm each). There is no conventional way to remove the mounting plate, so this will reduce portability somewhat depending on your needs.I recommend this tally counter to anyone who wants exceptional quality and functionality for a reasonable price.

it is working fine at 80 per min