Slide button mechanism in handle for quick, fast adjustment. DIY, industrial or professional use. Wide handle for increased leverage. Debris shield protects slide mechanism, & maintains a smooth operation. Forged steel. Chrome finish resists rust & corrosion. Polished head. SAE/ Metric size indicator on jaw. Size: 200 mm /8in. 1.1/4in/32 mm jaw capacity allows tool to work with various fastener sizes.