QuadBox? design saves weight in your toolbox by combining 4 sizes on one wrench;72 tooth ratcheting box end needs a minimal 5? to move fasteners vs. 30? for standard wrenches;Off-corner loading design on box end provides better grip and reduces fastener rounding;Flush mounted reversing levers allow you to change direction without removing the wrench;Manufactured from alloy steel for better strength and longer tool life