(8) Large Size Hex Bit Sockets: 9/16 1/2 Drive (ATD-201) 5/8 1/2 Drive (ATD-202) 11/16 1/2 Drive (ATD-203) 3/4 1/2 Drive (ATD-204) 14mm 1/2 Drive (ATD-214) 15mm 1/2 Drive (ATD-215) 17mm 1/2 Drive (ATD-216) 19mm 1/2 Drive (ATD-217) Large size sae metric hex bit sockets Bits are made from S2 steel to meet or exceed torque specifications Sockets are made from heat treated chrome vanadium steel for strength durability