Design was developed to either side mount to a 3D welding table or surface mount to a bench or 1D welding table, the choice is yours. It comes standard with 3 support arms that are precision laser from 6mm steel with 15 steel sacrificial cutting slats giving you a generous cutting surface of approximately 18" X30". The steel slats are easily replaceable with 30 x 2mm flat bar, readily available at most hardware or local steel suppliers, replace these slats with the same length or extend your attachment with longer flat bar giving you added flexibility.