1. Forged from zinc alloy, rust resistant, high-strength, and has a long service life.
2. It can be fixed at different positions on the drill bit, firmly clamped, accurately controlled drilling depth, easy to operate, and quickly positioned.
3. Suitable for drill bits of different styles with diameters ranging from 5-11mm, easy to install.
4. Three wooden drill bits made of chrome vanadium steel (CV), with diameters of 6, 8, and 10 (mm), used for drilling into cork.
5. Comes with 1 Allen wrench for adjustment.