21 MM Satin finish 12pt combination wrench

Urrea wrenches are manufactured under ASME B107.100 specifications and incorporate the UGS system on all open-ends. UGS system was designed and patented by Urrea, which offers the following benefits: If a nut or a bolt’s edges are stripped, the 3-point contact distribution ensures that there is enough not contact to tighten or loosen. When torque is applied, the force is distributed to three points, thus reducing stress on the nut or bolt edges. * The specific length can present a variation of +/- 0.5”. Satin finish. Exceed ASME B107.100 standard. Opening size: 21mm. Total length: 10-5/8”. Outside diameter open end: 1-11/16”. Outside diameter box end: 1-3/16”. Head thickness open end: 3/8". Head thickness box end: 15/32".