waltyotur CNC Milling Machine Vise Lockdown Bench Vise 4 Inch , With Base Clamp Vise, High Precision Clamping

Vise bed is made from grey cast iron and the maximum tensile strength of the vise bed is 28,000 PSI. Sliding surface of the vise bed is flame hardened and ground. This Vise is so designed that the horizontal force generated by tightening the handle pushes the semi-sphere within the movable jaw and thus thrusts the movable jaw downward.

Each pound of force in horizontal induces 1/2 lb of downward force, eliminating jaw tilt. The workplace does not move up, even if it is held at the top of the jaw plates.