Diablo, 4-1/8'', High Performance Hole Saw, Delivers Faster Cutting Performance & Increased Productivity, Hole Saw Design Provides Ultimate Cutting Depth To Bore Deeper Holes In 1 Pass, Variable Tooth Design For Faster Cuts With Less Vibration & Tool-Free Plug Ejection For Fast Material Removal, Snap Lock Offers Quick & Easy Change System With No Down Time, 1 Snap Lock Mandrel Fits All Diablo Hole Saws, From 5/8" To 6" Diameter, For Use With Wood & Metal, Mandrel & Pilot Bit Sold Separately.