10 Pc. Brake Caliper Bit Socket Set (10) Disc Brake Caliper Bit Sockets:. 1/4” 1/4” Drive Hex Bit Socket (ATD-196). 5/16” 3/8” Drive Hex Bit Socket (ATD-187). 3/8” 3/8” Drive Hex Bit Socket (ATD-188). 7mm 3/8” Drive Hex Bit Socket (ATD-193). 8mm 3/8” Drive Hex Bit Socket (ATD-124556). 10mm 3/8” Drive Hex Bit Socket (ATD-124557). T40 3/8” Drive Star Bit Socket (ATD-124563). T45 3/8” Drive Star Bit Socket (ATD-124564). T50 3/8” Drive Star Bit Socket (ATD-124565). T60 1/2” Drive Star Bit Socket (ATD-138). Sizes for most popular domestic & import disc brake caliper fasteners. Bits are made from S2 steel to meet or exceed torque specifications. Sockets are made from heat treated chrome vanadium steel for strength & durability 13789