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)

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.

I broke my arbor and bought it with the hole saw. Great deal!

Fast shipping exactly what I needed

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.

I needed the 6 3/8 hole saw to install a duct for a range hood through four kitchen cabinets. The Koopi is a heavy duty unit, accent on heavy, and the one I received seems round and well balanced. Learn-by-doing experience: I found that my 20 volt Dewalt drill is adequate for this saw, but I wouldnt want to use anything smaller. The saw is unwieldy to use, especially in the top of a wall cabinet where keeping the saw parallel to the cutting surface is a challenge. Using the drills clutch to keep the drill from spinning dangerously when the teeth bind in the wood was the only way I could manage it. This way when the saws position isnt just right the drill clutch engages; when the hole saw is correctly placed the teeth do their job fairly well. It did take some time to cut each 1/2 inch deep hole--and my high end Dewalt drill got very hot--but the saw worked well. Ive cut seven plywood holes so far and the saws teeth dont seem too worn yet. This is a pretty good tool for something I only need for one job.

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!

Cut through fibreglass easily

This did exactly what I needed it to do. I would rate it for 15 or so holes through plywood sheet metal etc. Came with extra centering drill bits and Allen wrenches. If youre not doing this professionally and repeatedly this is all you need.

Only used it once so far, to cut through the roof, but it is heavy duty, cuts well and easy to use.

This was an awesome investment. I used it for cutting holes in drywall to install Round outlet boxes for lights.