Drop forged, heat treated, chrome plated, carbon steel. Raised panel provides added strength and durability. Precision machined.12 point box ends.

Sizes- Item # 89060m (35,38,41,45,48,50 mm). Item # 89060 (13/8", 1 1/2", 1 5/8",1 3/4", 1 7/8", 2", 2 1/8",  2 1/4").