Power tools for use in metal working, namely, jigs, fixtures, fixing supported devices, clamps, and component accessories thereof, namely, base plates, angle plates, grid fixture plates, blank fixture plates, sliding units, slide bases, lock risers, lock buttons and screws, stops, locating adaptors, riser pads, round adaptors, positioners, support cylinders, locating cylinders, screw jacks, screw jack tips, riser cylinders, tooling blocks, and locating screws