Abstract: A replaceable vise jaw insert assembly is disclosed for mounting on either the fixed or movable vise jaw of a mill vise or the like. The vise jaw insert assembly includes a clamping member adapted for attachment to one of the vise jaws of the mill vise, preferably by two threaded members. Facing surfaces of the clamping member and vise jaw are spaced apart and inclined relatively toward each other. An insert member having a wedge-shaped portion configured for generally mating engagement with the facing surfaces of the clamping member and vise jaw causes the wedge-shaped portion of the insert member to be captured therebetween. The insert member is also formed with a gripping surface for securing a workpiece on the mill vise. The insert member is preferably an extruded member, the gripping surface and wedge-shaped portion of the insert body being extrusion formed.