ITEM NAME:5Pcs #5 #6 #8 #10 #12 HSS Countersink Drill Bit Set Quick Change Hex Shank A7R8 5Pcs #5 #6 #8 #10 #12 HSS Countersink Drill Bit Set Quick Change Hex Shank A7R8 Drills The Pilot Hole And Recess For Countersinking All In One Step. Fast, Smooth Cuts In All Types Of Wood And Plastic. Loosen Set Screw To Adjust Drill Bit Depth For Variable Screw Lengths. The Drill Bit Is Replaceable. colour:black Material:HSS size:drill:1.98mm 2.38mm 2.78mm 3.175mm 3.56mm Hexagon handle size: 6.35mm Package Contents:1 x drill(5 pcs) 1x wrench Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.