Features of the clock accurate travel for time, daily error of 1 second, of 2-3 years, low power consumption, ordinary batteries can be used for 6 months AA battery is not included). EASY INSTALLATION: Pendulum clock movement kits are with a simple and elegant these replacement parts are for of clock stands. Suitable for craft clocks, porcelain crystal paintings, repair and replacement, home decoration craft clocks, Size: The total shaft length is about 12mm/0.47inch, the thread length is about 5mm/0.2inch, and the jumping second movement is suitable for clock panels with a thickness of 2-3mm/0.08-0.12inch. Note: Please refer to the installation diagram for the installation of the After the three pins are installed, the three pins should be parallel when viewed from the side, and it is better not to for touch the pins.