Chuck: Alloy Steel

Shank: Carbon Steel

0.3-6.5mm   (0.3-3.4mm, 0.3-4mm are Available)

1/4 Inch Hex Shank

1.Three - jaw head design, grips extra-fine bits from 0.3mm up to 6.5mm; also holds many rotary tool accessories. Keyless chuck finger-tightens for easy bit changes - no chuck key needed,1/4-inch hex shank snaps easily into the power drilldriver.

2.This chuck allows impact driver to function like regular drill and hold non-quick change drill & driver bits.

3.Unique torque thrust bearing is easy to handle applied translate into greater clamping force.
4.A good choose to transform the chuck way between different electric tools.