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 bought this to drill 6 holes in my ceiling to install LED lights. It is a custom home from the early 70s, so the ceiling drywall has about an 1/8-3/16 of plaster finish. By the third hole, the teeth were 75% gone and it would not cut. I had to cut the remaining three holes with a key hole saw - that saw had no problem at all cutting the plaster-coated drywall. Im sure the plaster layer is more abrasive than plain drywall, but this bit is supposed to be able to cut through metal. I cant imagine this bit would hold up for very long in anything other than plain drywall. If thats how it was advertised, Id be fine with the outcome, but they represent this as a cuts anything bit, and that is very far from reality.

The hole saw diameter was perfect. The hole saw tool seemed of very good quality. But. But it will fit only 1/2 drills, not the more common 3/8 that I have (nor the smaller 1/4 size. My goof. The small print specifies this.

Used on 1 1/2” floor joist had to auger out pilot hole 3/8” to get the depth

This was purchased to drill a vent hole into the side of a dryer. With a little cutting oil, the holesaw cut right through the outter and the inner panels. Now Im not saying that this tool would cut the same holes all day long, all I am saying is the tool did what I needed done, which was a 4 hole in the side of the ol;d bags new dryer. Pressure off. Well worth the price.

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

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.

everything

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.

Sawed over 100 holes thru wood for a ice-cream cone craft stand. Worked perfect.