High quality. Made of heat-treated chrome vanadium steel for high-torque applications. 1/4" shank. For quick-change chucks and drills.
9-Pc Metric Set includes: 1/4", 5/16", 9/32", 11/32", 3/8", 7/16", 13/32", 1/2" & 15/32" drivers and storage rack.