Bi-Metal Hole Saw Kit, 7 Pcs 7/8" to 2-1/2" General Purpose Hole Saw Drill Bits, HSS Hole Cutter with Arbor for Wood, Plastic, Drywall, Size(22,25,28,35,44,51,64)

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 hole saw to cut holes in my drywall ceiling for 6" thin LED lights by Halo. The size was perfect for these lights. I had no problem cutting holes in the drywall. It worked fine for my 3/8 drill. Would I buy this for cutting through thick lumber, no. You should use one designed for a 1/2 inch drill with a locking arbor for heavy work. This arbor will come unscrewed if spinning freely and you slow the drill down or go in reverse. For drywall and plywood it will work well. But for the money I am happy with my purchase.

This hole saw works fine for a few holes, but it it not for you if you need cut more than 3 - 5.I used it to cut one hole through a 2” thick desktop (veneered particle board) then two holes in 1.5” thick (veneered particle board) cabinet walls. Lost one tooth, and the saw is basically too dull for further use.Lucky that was all the holes I needed it for.Buy it if that’s what you need, otherwise go with a brand name tool.

Bought this for cutting holes through plastic, and it works well.

hard to find 4 1/8". This blasted thru my 18 holes in 1/2' plywood just fine

I am winterizing a stay cat shelter that stays on my porch. Note, I bought the shelter on Amazon but it only has one entrance/exit and we live a semi-rural area with raccoons, opossums, and other critters who will kill a cat who can't escape. My solution was to buy this drill bit and drill the standard 6-inch hole recommended by kitty TNR and rescues. (Six inches will keep a lot of critters out while still being enough for a cat to enter/exit freely.) The bit is really sharp and it cut through the 4-inch thick cedar and insulation like almost nothing. This is my first time with a round bit and I learned not to press it. Just hold it in place and let it do the work. This bit will do the work in no time.Note: The work isn't done yet. I have protected the edges of the hole with Gorilla tape on both sides and through (see picture). And before the snow comes, I will be lining it with heat-reflective material and adding a heavyweight vinyl slitted closure to keep the heat in as the kitties move in and out of their little home. Also, I'm adding a windshield to the fence around the porch.This entire project is made up of Amazon purchases.Outdoor Cat House:GDLF Outdoor Cat House Feral Cat Enclosure 100% Insulated All-Round Foam Weatherproof Solid Wood Large Size for Multiple Cats 34.5" L*21.5" W*27.2" HDoor:-6Inch Hole Saw, LAIWEI Hole Cutter, Drilling Tool for Drilling Wood, Aluminum Profile, PVC and Other-USA Fabric Store Clear Vinyl 30 Gauge Isinglass Double Polished Marine Boat by The Foot 54 Wide-VELCRO Brand Heavy Duty Fasteners | 4x2 Inch Strips with Adhesive 8 Sets | Holds 10 lbs | Black Industrial Strength Stick On Tape | Indoor or Outdoor Use (VEL-30703-USA)Insulation:-US Energy Products (3MM) Reflective Foam Insulation Shield, Heat Shield, Thermal Insulation Shield Radiant Barrier (24" x 10ft)-The Kitty Tube Wisconsin Grown Oat Straw (STRAW ONLY - bec it doesn't mold and dries fast.)

So this drill is very beefy and sturdy. The only problem is not that it isn't good, it's that unless you attached this drill with locktite or better, when you stop drilling, the hole drill will spin itself right off the center drill post. You may try and stop it with your hand and slice your fingers. Very dangerous for a novice user. I was very careful and drilled 3 holes. The drill came off on 2 of those holes. If they fix this hazard, i would give it 5 stars.

Adding a hole to a standard desk for power station and the internal bit threaded/stripped within 30 seconds of drilling - so the small drill bit was spinning, but the outside wasn’t. Couldn’t even finish one cut. Maybe I got a dud, but mine is already in the recycle bin. Buy something else.

Really surprised as to how well it cut. Used it to cut 16 holes in some very hard dry Red Gum. Performed admirally and still sharp!

Happy to find this saw as this size proved impossible to find locally.

sharp product, well priced

剛性感がありしっかりと穴あけできます。

... every time you stop the drill abruptly, the hole saw will fall off the arbor. It didn't seem to matter how much I tried to tighten it on. If you aren't going to use your own arbor, I also found it effective running the drill in reverse. If you opt to use neither suggestion, than at least wear some thick gloves (or have a partner on standby to get you to the hospital)! Cost effective and I would probably purchase again if I required a replacement or a different size.