Wright Tool WRIGHTGRIP® 2.0 12 Point Box Wrench Set 7 Piece SAE 749As a standard feature on the Wright open end of combination wrenches, precision placed protrusions are custom engineered for each wrench size to keep it seated on the fastener, increase torque and reduce slippage. Simply put, you won't find a better wrench. Period. 50% More protrusion engagement than all wrenches 80% Stronger than all wrenches Optimized flat contact to remove force from the fastener corners Precision broached for consistent quality