72 tooth ratcheting box end needs a minimal 5° to move fasteners vs. 30° for standard wrenchesOff-corner loading design on box end provides better grip and reduces fastener roundingPass-thru® technology works down any length of threaded rod and long boltsThin head and beam provide greater access in confined work areasSize conveniently stamped on both ends of the beam for quick identificationManufactured from alloy steel for better strength and longer tool lifeBright, full polish chrome finish wipes easily clean to resist rust and corrosionMeets or exceeds ASME and ANSI specificationsPlastic wrench rack included for tool retention and storageIncludes the Following SAE Sizes: 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" WrenchesLifetime Warranty