The original adjustable wrench, made by the world-famous Crescent® brand; Laser etched scale in both SAE and metric sizes allows easy fastener size identification; Larger knurl provides a tighter jaw fit, is easier to adjust and is less likely to bind up; Hex jaw design reduces slippage by gripping fasteners tightly; Wider handle improves comfort and reduces fatigue; Heat-treated forged alloy steel for toughness and durability; Tension spring stabilizes jaw and allows easy knurl adjustment; Chrome plated finish wipes clean easily and resists rust and corrosion; Polished head and satin finished handle; Large capacity 1/2", 13mm jaw fits a wide range of fastener sizes