Craftsman 54pc Driving Set 1/4" Speed-lok Quick Connector, Power Bit, Nut Setter 1/4 inch Speed-Lok quick connector prevent the bits from slipping in the drill Bit holder, 33 1" insert bits, nine 2-inch power bits, three 3-inch power bits,seven nut setters Made of high speed steel A compact molded case helps keep everything together Weighs 1.6 pounds