Resistant Finish: Treated with black coating to rust and resist oil stain, maintaining optimal in humid or greasy workshop environments Metal Construction: Made from premium alloy steel with heat treated forging for hardness and toughness, ensuring Impacts resistance and long lasting durability even under heavy duty use in mechanical repairs and industrial maintenance Universally Compatibility: Features standard 3 / 8 " square drive interfaces that securely fits ratchets, torques wrenches, and pneumatic tools without wobbling, making it ideal for automotive servicing and equipment assembly Clear Size Identification: clear size markings with color coded bands provide quick size recognition, eliminating guesswork during furniture installation or machinery maintenance tasks Comprehensive 12 Piece Set: Includes essential bit size to handle various fastening needs, from vehicle repairs to industrial equipment servicing, offering complete in organizers, Manufacturer: Mekalero