Diablo, 4-1/4" x 2-3/8", 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 5/8" To 6" Diameter, For Use With Wood, Metal, Mandrel & Pilot Bit Sold Separately.