آلات طحن 4 spacemirrormystery.in. 4" 440V CNC Milling Machine Vise 0.0004" Shars. 440V Advantage. Unlike other less expensive import vises, 440V offers key improvements to prevent jaw lifting by using a 45 degree wedge and a pivoting ground finished steel hemisphere in a milled pocket to hold down the movable jaw while stationary jaw features integral key to increase holding strength ...