1/4＂ Hex Shank to 3/8＂-24UNF Male Thread Reverse Screw Adapter for Keyless Drill Chuck

d1 = 1/4''

d2 = 3/8''-24UNF

Quick Change Hex Shank

Black Oxide   (Sand Blasted is available)

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). Suitable Drill Chuck Size: 6mm, 10mm, 13mm(3/8-24UNF).