Electric Impact Drill Chuck 3/8"-24UNF Hex Shank Adapter with Screw

HEX END: Hexagonal end used to increase operator productivity and convenience by speeding up bit changes. 3/8"-24UNF: 3/8"-24UNF hex adapter for drill chucks. COMPATIBLE: Compatible with a 3/8"-24 UNF threaded steel locking chuck. VARIABLE SIZE: Suitable chuck sizes: 6mm, 10mm, 13mm (3/8"-24UNF). SCREW: The screw head fits perfectly into all keyless chucks (3/8"-24 UNF).