- Patented locking grooves help prevent the wrench from slipping off the fastener when turning
- Anti-Slip Design (ASD) open end
- The chrome-vanadium switch lever allows for easy changes in turning direction which helps improve speed
- Loads are kept off the corners of the fastener which helps prevent fastener rounding
- 15° angled offset box end helps keep shank clear of obstructions
- The arched surfaces are designed to spread the contact forces over a wide area
