Phosphated hardened and anti-corrosion treated Comfortable handle Graduated jaw As per DIN 3117 BS 6333 ISO 6787 GGG-W6316 Type 1 Class 2 and ASME B107 8M-1991 Ergo Type Manufactured from drop forged chrome vanadium steel Ground and polished parallel gripping jaws with etched measurement scale The adjustable jaw does not fall out at the maximum opening capacity