4pcs Countersink Drill Bit Set 1 4in Hex Shank Adjustable Woodworking Tapered Drill Bit with Hex Wrench

Feature: 1. Including a mini hex wrench. 2. Detachable and the length is adjustable. 3. Apply to the drilling machine that has collet or joint. 4. These countersink drill bits works great in wood and wood chip. 5. It includes 4 sizes in one countersink drill bit set(6#, 10#, 13#, 16#). 6. High speed steel drill and carbon steel countersink and chamfering machine. 7. Including a mini hex wrench. High speed steel drill and carbon steel countersink and chamfering machine. Specification: Material: High speed steel+carbon steel Hex Shank Diameter: 6.35mm . Package List: 4 * Countersink Drill Bits 1 * Hex Key