Premium Quality Structure: The whole bench clamp is made of high-quality material with high hardness and stiffness. Designed for long-term service time. Powerful Clamping Force: After fine grinding treatment, the surface of the clamp is smooth and flat. Clamping the workpiece without shaking, and the machining accuracy is higher. Jaw Width: 4 inch (100 mm）；Jaw Opening: 4 inch (100 mm）. High Accuracy Screw: The screw rod is made of high strength material which is not easy to deform, wear resistance, and achieves smooth rotation. Accurate to 0.002" on parallelism and squareness. Reinforced & Adjustable: The solid base and swivel handle make the use more stable and convenient. Easy to operate and improving working efficiency. Maximum clamping force of 19 KN. Wide Application: It is an essential tool for fitters. Most work of the fitters is completed by using the clamping vise such as sawing, filing, chiseling, and some assembly and removal jobs.