DEWALT DW2712 No.10 Replacement Drill Bit and Countersink
The DEWALT DW2712 No.10 Replacement Drill Bit and Countersink is designed for use with a drill/drive system. It is a combination drill and countersink all in one. Replacement drill bits with countersinks provide a less costly solution to replacing the entire unit.  Black oxide split-point drill bits start on contact.  For drilling and countersinking holes in wood.