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, Pass-thru® technology works down any length of threaded rod and long bolts, Thin head and beam provide greater access in confined work areas, Size conveniently stamped on both ends of the beam for quick identification, Manufactured from alloy steel for better strength and longer tool life, Bright, full polish chrome finish wipes easily clean to resist rust and corrosion, Meets or exceeds ASME and ANSI specifications,