Diablo, 118 x 238, Hole Saw, High Performance Delivers Faster Cutting Performance Increased Productivity, Design Provides Ultimate Cutting Depth To Bore Deeper Holes In Single 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 58 To 6 Diameter, For Use With Wood, Metal, Mandrel Pilot Bit Sold Separately