Hardened and heat treated high quality drop-forged steel. Precision ground, fully polished offset jaws with Metric calibration for accuracy. Black phosphate finish for long term corrosion resistance. Slim raised lip style handle with hanging holes for alternative storage. Set of four containing 150, 200, 250 and 300mm wrenches. Jaw Capacity: 19, 24, 27, 34mm., Weight: 3.4392112872 pounds, Manufacturer: Sealey