Koopi 4.25 Hole Saw with Heavy Duty Arbor, 38mm Depth Bi-Metal 4 1/4 inch Hole Cutter for Easily Drilling Wood, Plastic, Plywood, Drywall, Thin Metal (108mm)

I HAD 50 LIGHTING ADAPTERS TO MAKE THAT I NEEDED TO MAKE A 6-3/8 HOLE IN 3/4 PLYWOOD TO INSTALL A WAFFER LIGHT IN , AND A SKILL SAW WAS GOING TO TAKE FOR EVER. SO I OREDRED THE HOLE SAW AND MADE A FIXTURE TO HOLD THESE IN A DRILL PRESS AND THE SAW DID THE TRICK SLICK AND EASY, QUALITY WAS GREAT COMPAIRED TO HIGH PRICED UNITS IT COMES WITH 2-DRILL BITS AND THE HOLDING ADAPTER AND HEX WRENCH, WOULD BUY AGAIN!!!

This worked exactly as I hoped. Cut 5 holes in 10 minutes start to finish. I was cutting holes for 6” recessed lights in 1/2” wood ship lap. Last hole cut with same ease as first. Yes it makes a little mess but HELLO, you’re cutting wood. I covered floor and countertops with shipping blankets. Clean up was minimal and easy. Arbor locks into bit for safe use. *** Need 1/2 Chuck. ***

I was tall was as described I recommend using your drill and reverse when sawing sheetrock

Although they seemed a little pricey...the investment was well worth it. I purchased the 6 1/2 and 4 1/4 sizes for my 6 and 4 Torchstar Slim LED lights (purchased on Amazon) and they were amazing. I added 40 lights and these paid for themself after 5 in my opinion. Make sure you have a 1/2 drill, i didnt read that part so I borrowed a friends, I had a 3/8.

Arrived safe and sound, used it to cut sheet steel. Easy cut through.

This hole saw worked great for installing some recessed lighting, however I’d be concerned about the longevity of this product solely due to the fact that I only installed 4 and a few teeth were getting dull (ONLY from drilling through sheet rock/drywall). I’m sure for the average consumer wanting to use it as a one time or very seldom tool in order to install recessed lighting, it’ll be great however if you’re in a trade where you perform this type of work quite often I would look to invest in a name brand hole saw.

Good value, came with spindle and an extra center bit which is really nice. Seemed to clog a little faster then some of the name brand hole saws I have in my collection but did an adequate job of cutting. Didnt cut all the way through so unsure of how hard it is to remove the cut out piece only has small slots for that purpose. All in all excellent price and fast delivery.

Its not crazy high quality, but if youre a DIYer putting in some wafer lights, it will do the job without falling apart. Pro tip: run it in reverse to keep your drywall cuts clean and dont push too hard.

Gave to someone

before I ordered this I read the reviews, one person said teeth broke off just trying to saw sheet rock, so I went to hardware store and it was almost $50.00 so I thought I will take a chance on this one for half the money,sure glad I did I just cut through the floor 5/8 sub floor on 1 lumber went through like butter saw looked perfect after I was done, dont be afraid of this because of price, it tough!