Ball detent for secure socket retention; Impact rated universal joints are made from Chrome Molybdenum steel for strength and durability; Impact universal joints have a manganese phosphate coating for resistance to corrosion; 1/4", 3/8" and 1/2" drive chrome adapters allow different drive size ratchets, sockets and extensions to be used; 1/4" and 3/8" drive chrome universal joints allow access to hard to reach fasteners; Bright, full polish chrome finish easily wipes clean and resists corrosion; Includes blow mold case for storage and organization