Features:
1, 3/8"-24UNF hex adapter for drill chuck.
2, Hex end used for increase operator productivity and convenience by speeding bit changeovers.
3, Compatible with locking steel chuck of 3/8-Inch-24 UNF thread.
4, Screw head fits perfectly into any key less chucks (3/8-24 UNF).  

Specifications:
Thread Inside Diameter: 3/8"-24UNF

Suitable Drill Chuck Size: 6mm, 10mm, 13mm(3/8-24UNF)
Color: Black Main Material: Steel
Weight: 30 g(approx.)

Package Includes:
1 x Hex Shank Drill Chuck Adapter
1 x Screw