Alltrade 640437 7 Pc Metric Long Pattern Combination Wrench Set Includes 10,11,12,13,14,15,17mm. Extra length for more leverage and torque. Mirror-polished drop forged steel construction. 15 degree offset and chamfered walls for easy mating to fasteners. Boxed end features Z-Drive - contacts flats walls of fasteners for better grip. Meets or exceeds ANSI standards. Lifetime warranty.