Our advanced opening profile places more metal in high-stress areas to stiffen the jaws, increase tool strength and reduce permanent jaw spread – now a standard feature on all Wright open-end and combination wrenches. Precision placed protrusions are custom engineered for each wrench size to keep it seated on the fastener, increase torque and reduce slippage. Optimized flat contact to remove force from the fastener corners. Precision broached for consistent quality and tolerances. Protrusions optimized for each fastener size for added grip. Added premium Wright alloy steel for increased strength. WrightGrip 2.0 anti-slip design, is a standard feature on the open-end of combination wrenches.