Upgrade your vintage alarm clock with a precise mechanical clock hand adjust knob and alarm clock repair parts. These clock crown replacement accessories feature a metal knurled adjuster for quiet time-setting. Ideal for DIY clock repair in homes or schools, they extend clock life and ensure stable, reliable performance. Features - Color: Silver - Material: Metal - Size: 1.40 × 0.60 × 0.40 cm / 0.55 × 0.24 × 0.16 in - Wide compatibility: Universal clock replacement knob fits most mechanical alarm clocks, making it suitable for updating old or vintage models - Durable material: Crafted from wear-resistant metal, these mechanical clock parts ensure long-term performance as clock adjustment hardware - Precise adjustment: The analog clock hands set knob and clock winding stem knob allow for accurate time and alarm setting, restoring smooth and reliable operation - Quiet functionality: The knurled metal knob is finely polished to minimize noise, making it suitable for bedside use in quiet environments - Easy installation: Screw-on design enables straightforward DIY clock repair, allowing quick replacement of the clock stem pin or knob without professional assistance Package list: 4 × alarm clock knob accessories