The Tosa Tool Modular Vise Jaw 8"x5" is designed to fit your Tormach Machinist Vise and provide you another way to get the modular hole pattern in a vertical position. Think of it as a small angle plate with serious clamping power. Buy 1 to fit the back jaw or 2 so you can have one on the movable as well. Made from 4140PH steel with all the precision of the base plate. (pat. pend.)