72 tooth ratcheting box end needs a minimal 5? To move fasteners vs. For standard wrenches;Off-corner loading design on box end provides better grip and reduces fastener rounding;Thin head and beam provide greater access in confined work areas;Flexible head provides access to hard-to-reach bolts and fasteners;Size conveniently stamped on both ends of the beam for quick identification. 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;Thin head and beam provide greater access in confined work areas;Flexible head provides access to hard-to-reach bolts and fasteners;Size conveniently stamped on both ends of the beam for quick identification.