Review on MAGBIT 625 6616 MAG625 Carbide 16 Inch by Phil Casey

Used to cut 4 1/8" vent holes in Hardy Fiber Cement Finishing Board (1-thick concrete panel). . inch) and it worked! Watching your speed is important and if you are using a hand drill make sure it doesn't get stuck. Carbide grit works very well and does a great job of keeping debris to a minimum After cutting 4 perfect holes with a heavy duty commercial drill (not a hammer drill) the saw showed no wear.The saw cut through with minimal cracking on the back of the material.My only concern is that the maximum recommended speed doesn't allow this saw to be used with a drill According to a technical rep eter from Magnus Industries, the maximum speed you can use with this hole saw is around 250 rpm. I wanted to use it with a drill press, but the minimum speed on my drill press was around 550 rpm, which was too high to use a use saw. Overall very impressed with the quality and especially the price. And the standard mandrel is a nice plus, you don't need to buy or order anything special with this saw.