In-tool-home Countersink Deburring Tool Set Drill Bits 1/4 Hex Shank Chamfer Wood Metal Drilling 5/64 1/8 3/16 Set of 3 by in-tool-home This makes very nice smooth countersunk holes Set covers most popular sizes for countersinking and deburring, from 5/64in.-17/32in. Quick-change 1/4" Hex shank design and high speed steel construction deal for metal, wood and plastic 82 degree angle