ProMag Colt 1911 Vise Block, Black Provides a third-hand to work on and install parts to all 1911-series (single-stack) pistols Vise block is clamped into the users vise, and the block is then inserted into the grip-frame of the pistol Held in place by the magazine catch Constructed of a black, injection-molded polymer, for years of reliable service. Black Finish