5pcs Countersink Drill Bit Woodworking Screws Chamfering Wood Hole Drills Bit with Hex Key

Features:
Adjustable Counterbore: Adjustable length of the counterborn,with fixing screw,use the attached hex key remove the screw and adjust the length of the counterbore.
Premium Quality: The drill bit made of tungsten steel alloy,more hardness,provide fast cutting and strong force.
Efficient Work: Smooth counterbore drilled to save you time and labor. The surface of the workpiece will be perfectly embedded with screw cap.
Compatible with: Applied with drilling rig,bench drill,hand drill and charging drill.
Use Tip: Vertical to avoid the drill bit from bending or breaking.