Stanley 95-446 11-Piece 1/2-Inch Drive Deep Socket Set, Metric Max-Drive design, a unique radius corner design that provides 15% more torque Helps reduce fastener wear without contact with the outer 5% of the fastener 1/2" Drive deep length socket sizes 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 17mm, 18mm, 19mm, 21mm Limited lifetime warranty