In watchmaking, an engine is a mechanical device that engraves patterns, typically on a metal workpiece. Engines make stable cuts into the workpiece, producing uniform and precise engravings that are ideal for repetitive patterns. The two most common types of engine in watchmaking are the straight-line engine and the rose engine lathe. The straight-line engine is typically used for straight and linear patterns. The rose engine lathe can move its cutter more dynamically, allowing it to make wave-like, undulating patterns.