Twin Pack Drop forged chrome vanadium steel with phosphate anti-corrosion finish. Hardened parallel opening jaws are ground and polished, laser etched with metric graduations for rapid repeatable reference setting. The wide grooved profile of the opening mechanism and coarsely knurled adjusting screw ensures smooth adjustment. Slim head profile allows easy access, the contoured jaws improve grip when used on damaged misshaped fasteners. The unique geomatic cushion grip improves user comfort, is resistant to oil and grease to provide a slip free grip. Securely bonded to the I-beam handle sub frame to prevent the ingress of oil and dirt. Conforms to: BS 6333: 1983, ANSI B107.8: 1977, DIN 3117, ASME B107.8: 1996. Set comprises of: 200mm Overall Length - Jaw Opening: 28.6mm 300mm Overall Length - Jaw Opening: 38.1mm