Master Mechanic, 1 Piece Bi-Metal Hole Saw, .625 inch Arbor, M3 High Speed Steel Cut Edge, 1.875 inch Depth Of Cut, 4-6 Variable Tooth Pattern Provides Less Vibration, Delivering Faster, Smoother Cuts Then Conventional Hole Saws, Features Built In .375 inch Mandrel Which May Be Used With .375 inch Or Larger Drill, Recommended For Cutting Soft Or Hard Wood, Nail Embedded Wood, Stainless Steel, Pipe, Rubber and Conduit, Pilot Drill Included, Carded.