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 diamond type for workpiece locating. The tapered bushing and removeable riser are made from 1045 steel, precision ground, with a black oxide finish. The clamping screw is made from 4135 steel, quenched and tempered, with a black oxide finish.