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.