Metal watchmaker-style button with fan-shaped knob — mechanical movement for precise striking and no batteries required. Key benefits Easy, reliable operation: The fan-shaped knob provides a textured grip and smooth rotation for accurate manual adjustments. Precise mechanical performance: Built with a mechanical movement that delivers consistent, accurate striking without electronic timing drift. Low maintenance and eco-friendly: Operates without batteries, reducing running costs and environmental impact. Features and what they mean for you Material and build: Metal construction with a watchmaker-style button offers durable, tactile control that stands up to regular use. Function: Manual actuation via the knob drives a mechanical movement designed to trigger precise strikes or actions. Power and sustainability: Fully mechanical — no battery required — so you avoid battery replacements and electronic failures. Performance: Mechanical timing and striking provide repeatable results and feel appropriate for restoration, repair, or handmade projects. Compatibility and applications Designed for mechanical devices that use manual control and mechanical striking mechanisms (for example, wind-up clocks, alarm mechanisms, and music-box style movements). Ideal for watchmakers, clock restorers, hobbyists, and technicians needing a replacement or upgrade knob with reliable mechanical actuation. Typical use scenarios Restoring a vintage alarm clock: Replace a worn plastic knob with this metal watchmaker-style button to restore the original look and ensure dependable manual winding and striking. DIY clock or music box projects: Install as the control knob on handmade or repaired mechanical movements to provide precise, repeatable actuation without electronics. Repair and maintenance in workshops: Use as a durable replacement part for mechanical timers or small striking mechanisms where battery-free, consistent performance is required. Notes This product emphasizes durable metal construction, a fan-shaped knob for easy rotation, a mechanical movement for precise striking, and battery-free operation for energy savings and environmental considerations.