Features:
100% brand new and high quality
Mainly for fixing the drill bit， limited the depth of drill holes， make depth of the hole consistent.
More convenient to roundwood mortise Of Use.

Specifications:
Material: Carbon Steel
Surface: Black finish
Diameter: 3， 4， 5， 6， 8， 10， 12mm

Package includes:
7 x Drill Chuck
1 x Hex Wrench