INSTY-BIT : Quick-Change Pilot Countersink Set 82501
- Select drill size that matches the root diameter of screw thread. Use slightly larger for hardwood, slightly smaller for softwood.
- Adjust high-speed steel drill bits with 1/8" hex wrench to match screw length.
- 1/4" Hex power bit shanks are compatible with +Insty-bit 1/4" Quick change Chucks, Cordless Screwdrivers, and standard power drill,
- 2500 R.P.M Max
*Missing 9/64" bit