These tapered riser screws can be used to raise a workpiece in order to avoid tool interference with Clamping Modules (CP150, CP151, CP152). Use together with the round type for workpiece locating. Tapered bushing and removeable riser made from 1045 steel, precision ground, with a black oxide finish. Clamping screw made from 4135 steel, quenched and tempered, with a black oxide finish.