The ATD Tools 7-pc SAE Extra-Long Ball-End Hex Bit Socket Set, No. ATD-13791, are made from S2 steel to meet or exceed torque specifications and are heat-treated for strength and durability. The ball-end allows for angle entry and has an extra-long 4-1/4" shank for access to tight areas. The 3/8" drive set includes sizes: 1/8", 5/32", 3/16", 7/32", 1/4", 5/16", and 3/8".