Single open end wrench. The open end is thicker for very high tightening torques. Examples: public work, rail worksite, naval construction, agriculture, oil platforms, metallic construction.
- DIN 3120; - Cabeza de tornillo para VW, Audi, cilindro Fiat; - Socket made by chrome vanadium alloy steel; - Bit made by silicon alloy steel (S2); - Polished, chrome plated.