What's in the box:

4 Pcs/set Professional Countersink Drill Bit Set with Quick Change Hex Shank High Speed Steel Carbon Steel Counter Bore Woodworking Tool (Standard)

This is a set of countersink drill bit that is bore hole and chamfer 2 in 1, very professional and helpful in woodworking.

Features:
Including a mini hex wrench.
Detachable and the length is adjustable.
Apply to the drilling machine that has collet or joint.
These countersink drill bits works great in wood and wood chip.
It includes 4 sizes in one countersink drill bit set(6#, 10#, 13#, 16#).
High speed steel drill and carbon steel countersink and chamfering machine.

Specifications:
Material: High speed steel+carbon steel
Hex Shank Diameter: 6.35mm
Package Weight: Approx. 86g / 3.05oz
Package Size: Approx. 11 * 6.5 * 1.5cm / 4.33 * 2.56 * 0.59in

Package List:
4 * Countersink Drill Bits
1 * Hex Key