metal profiles and pipes; metal rods, plates, ledges, plinths, angles, trestles; metal support elements, namely support pins, support bolts, screw stands, atlas screw stands, head pieces, compact support blocks, support bases, height-adjustment keys; metal in the form of legs, sleeves, stop pieces, fork-shaped pieces, thrust pieces, thrust points, centering pieces, positioning pieces and springs, all for use in the processing of workpieces