Machinery is used in metal shops and production facilities to shape and finish parts in machining operations. Buffing and grinding machines sharpen or soften edges, polish, and shape material. Drill presses and magnetic drills create holes. Hydraulic presses apply a strong compressive force to flatten, shape, and stamp workpieces. Lathes shape and size rotating workpieces and add features such as threads. Metal fabrication machines shape or cut metal workpieces. Milling machines use rotary cutting tools to shape workpieces and add grooves and other features. Electric tapping arms create threads in holes. Engraving and marking equipment permanently etches text or images onto surfaces. Waterjet cutting uses high-pressure water streams to cut shapes in workpieces. Metal dust collection and air filtration keep workspaces and ambient air clean. Machine bases raise machines off the floor. Machine leveling components incrementally raise and lower machine parts, benches, or bases to level and position them.