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)

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!

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

I used this to drill one hole through steel siding, osb and some spray foam insulation in order to vent a bathroom basement exhaust fan. It worked perfect for my single hole. I ran it backwards at the beginning of the cut so it didn’t catch and I had a nice clean hole in the end.

Fast shipping exactly what I needed

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

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

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

Ordered this hole saw to install ceiling cans. It works great on the first three. After that It dulled quickly.

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. ***

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