Also known as mild steel, multipurpose steel includes low-carbon grades, such as 1018 and A36. Easy to machine, form, and weld, it's widely fabricated into fixture clamps, mounting plates, spacers, and other parts that don’t require high strength.

Often called architectural bronze, 385 brass is easy to machine and has excellent formability when heated. It is typically used for handrails, ornamental trim, and hardware, such as hinges and lock bodies.

Use clear plastic for windows, instrument covers, display cases, and other applications where visibility is essential.

A good all-around choice, Garolite G-10/FR4 is strong, machinable, and electrically insulating. It meets UL 94V0 for flame retardance.

The open top allows these foam U-channels to slide over and cushion an edge.