Hole Saw Drill Bit LAIWEI HSS Hole Cutter with Arbor for Wood and Metal (5-3/4"(145mm Hole Saw))

It’s a hole saw! All I can say is it is very sharp. It It cut all the hole through my composite decking and is still sharp.

I bought the 6-1/8" blade (it says 6-1/9" on the listing but I think that's a rounding error). It was great for installing pot lights in ceiling tiles. I also used it for 6" heating duct to install a cold air return through a plaster wall. It performed well in the materials I used, which are fiberboard and drywall. It produces a nice clean hole and saved a lot of time.

Goal:Install USB, audio and HDMI ports into the front of my arcade machineHoles required:30mm38mmWood thickness:Close to half an inchType of wood:Laminated thick particle board (it's VERY sturdy)My experience with drilling:I'm a noobie. Also my first time using a hole saw drill bit.Drill i used:Some old school corded drill that i borrowed.__________Product Pros & Cons....Pros:- Drill bit works on a hand held drill- It works (my photos show the result)- It's pretty sharp. Not exacto knife razor sharp but obviously sharp to cut all my holes.- I guess this is what they mean by "self-feeding" the drill bit drilled into the wood first, then the hole saw grabs onto the wood and then it begins cutting the hole. This made it VERY easy to cut a perfect circle.- It has slots on the sides of the drill bit. Makes it easy to stick a flat head screwdriver into the slots to eject the wood that gets stuck in the drill bit (My photo shows the wood caught in the drill bit)TIP:Stick the flat head screwdriver into one of the slots. Push the wood out a bit. Then take the screwdriver out, and place it into the other slot. And push the wood out. And keep going back and forth slowly pushing in each hole until the wood pops out or enough to where you can grab the wood by hand and pull it out.BUT BE CAREFUL:The metal drill bit will be VERY HOT after you drill with it. Don't touch it with your bare hands. Give it a few minutes to cool down. Unless you have protective gloves or something like that.- The drill bit is red. I do like the color Red. So that's neat. But just know. After i drilled a few holes. The red paint job starts to get worn down. It looks like a beaten down iron man suit after 1 or 2 holes. But that's fine. The color doesn't matter.- Packaging. Comes exactly like it's shown. They come in small light weight individual plastic cases. So when you're done, you can store the drill bit into the case. The case has a label with the drill bit size.- Spring. This drill bit has a spring. I honestly have no idea how useful that is or how that works. I just know the product works.- My holes were cut very straight. Took a small amount of effort. Took me 1 minute or less to cut through. I was going around a medium speed. I was trying to be very careful not to bang my hand into the wood once i broke through and was also being careful not to have the drill twist my wrist. Toward the end of the hole the drill slightly wanted to twist but i held on with 2 hands to prevent it._____________CONS:- The holes i made were not 100% perfect (some VERY TINY wood chipped around the edges of the hole) but this is probably my rookie mistake. I used a black sharpie to clean up small little chips. The adapters i installed cover some of the imperfections.TIP:When you drill into wood, the side that is visible is the side you want to drill into. Because the other side of the wood will be pretty damaged. Basically. The wood on the inside of the arcade wood cabinet, it's badly damaged once i made the holes. Wood is very badly chipped. But that's fine. No one will see that side.MAKE SURE YOUR DRILL IS SPINNING IN THE CORRECT DIRECTION OR YOU WILL BREAK THE DRILL BIT- My 38mm drill bit broke (BUT IT WAS MY FAULT)Lack of instructions. They expect you to know what you're doing. I borrowed the drill i used. It was given to me and it was set in the wrong direction. I didn't notice. I didn't think it even mattered. Until the 38mm drill bit broke. I had no problems with the 30mm drill bit. But the 38mm bit has threads to allow the hole saw to be removed. You can spin the hole saw on and off with your bare hands. So when i cut with the 38mm in the wrong direction. The wood saw caught into the wood and it couldn't spin in that direction. So I accidentally stripped the threads that hold the 38mm hole saw in place.Rookie mistake.TEST HOLES:As you can see from my photos. I did test holes. I cut holes into foam core, then stuck the adapters in. Just to test it. I imagine you can do the same with cardboard boxes. Good way to test to see if it's the correct size you need.OTHER INFO:For anyone buying those USB 3.0, etc adapters, if you're wondering what size they use here's the info:dual usb 3.0 = 30mm holeusb 3.0 + audio = 30mm holedual HDMI = 38mm hole

I bought this to cut metal siding, first attempt broke the pilot bit. Installed another bit and never made it thru 25 gauge siding.

I bought this to install a ducted range hood for a friend. I wasn't expecting too much due to cost and I usually use Sutton or Lennox.Holesaw does not feel sharp initially, but this is just the paint covering up the edges. It cut very aggressively through cabinets and weatherboard.Well worth the money for a few jobs that may need a hole this size (I used for 125mm ducting)

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