Screw machine parts are complex parts that are usually cylindrical and threaded. Some products produced by screw machines include screws, bolts, pins, fittings, bushings, rivets, fasteners, and studs. These components are used in the manufacture of an endless amount of goods, as well in construction and repair. Similar to lathes, they can produce parts at high speeds and may have multiple spindles - the most common configuration being a six-spindled machine. Every spindle contains the same material and turns its material at the same time as the other six spindles. Screw machine parts can be made from aluminum, plastic, wood, brass, steel, and other materials. The products made by screw machines are integral parts of the automotive, agricultural, medical, electronic, and recreational industries.