The width of this Stainless Vise's jaw is 15 mm (0.59"), and maximum jaw opening is 70 mm (2.75"). It is suitable for the workpieces with length less than 15 mm (0.59") so that it can adjust upper lid and bottom lid to optimum position. It also increases the speed of cutting. Copper wire won't be broken easily. The height of workpiece is 100mm (3.93"), and the accuracy of perpendicularity can reach within 0.001 mm (0.000039").