Mill Vise Accuracy machining with high accuracy Full 360° swivel base with graduation included Used in milling, shaping and drilling machines. Angle tight, postive lock style-lock down type jaws Jaws interchangeable with industry standard vise The vise bed is made from grey cast iron. After fine grinding treatment, k type angle lock nut is made from the ductile iron, firm and durable jaws interchangeable with industry standard vise. Fit for milling, drilling machine and accuracy parts finishing it is an essential tool for fitters. What are the maximum opening of this lock down vise accuracy milling vice? The maximum opening of 3 inch jaw is 77 mm, 4 inch jaw maximum opening is 116 mm, the maximum opening of 5 inch jaw is 148 mm, and the maximum opening of 6 inch jaw is 160 mm. What are the overall length of this lock down vise accuracy milling vice? The overall length of 3 inch vise is 250 mm, 4 inch vise overall length is 328 mm, the overall length of 5 inch vise is 376 mm, and the overall length of 6 inch vise is 432 mm. Can the clamping block be disassembled? The clamping block is detachable, which can be replaced quickly and reduce the maintenance cost. What material is this lock down vise accuracy milling vice? This is made of cast iron, which is wear-resistant, durable and has a long service life. Will the workpiece tilt up after clamping? It will not rise, because there is a hemispherical structure inside, there will be 45° downward force to clamp the workpiece, so as to ensure that the workpiece will not float.