Stanley Proto J52220 29 Piece 6 Point 3/8" Drive Metric Socket Set Includes: 8mm through 19mm Sockets, Universal Joint, 2 Extentions, Hinged Handle, Ratchet, and Set Box Helps minimize fastener rounding and extends fastener life Turns worn, rounded and rusted fasteners more easily Engages to the fastener flats, not the corners Minimizes slippage