Ratcheting box end needs as little as 5 degrees to move a fastener vs. 30 degrees for standard box end wrenches. Surface Drive on box end reduces fastener rounding and provides a stronger grip on fasteners. Delivers ratcheting productivity to very large fasteners and saves time and energy. Long pattern wrenches provide excellent leverage and power. Heavy duty to withstand the most challenging work environment This wrench delivers ratcheting productivity to very large fasteners unlike a traditional combination wrench that is cumbersome and difficult to reset on the fastener.