An eighteen piece accessory set for impact drive tools. The set includes a selection of extension bars, socket adaptors, bit adaptors and universal joints. Made from chromium-vanadium steel for strength and durability and helps resist abrasion, oxidation, and corrosion. Black phosphate finish for protection Supplied in storage case Set contains: 1/4"" Drive impact extension bars: 3"" and 6"" 3/8"" Drive impact extension bars: 3"", 6"" and 10"" 1/2"" Drive impact extension bars: 3"", 6"" and 10"" Impact socket adaptors: 1/4"" F x 3/8"" M, 3/8"" F x 1/4"" M, 1/2"" F x 3/8"" M, 3/8"" F x 1/2"" M Impact universal joint: 1/4"" Drive, 3/8"" Drive and 1/2"" Drive Impact bit adaptors: 1/4"" Hex x 1/4"" Drive, 1/4"" Hex x 3/8"" Drive and 5/16"" Hex x 1/2"" Drive