Open end quickly ratchet nuts and bolts without removing the wrench from the fastener72 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 roundingLong beam provides greater leverage to maximize torqueManufactured from alloy steel for better strength and longer tool lifeBright, full polish chrome finish wipes easily clean to resist rust and corrosion5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"