Diverse options: One silent clock mechanism, three pairs of hour(2.76 inches to 4.71 inches)/minute hands(4.24 inches), and a second hand - multiple combinations to choose from! Clock Movement Parameter: The short-shaft clock device has a shaft length of 12 mm (15/32 inches) and a threaded length of 6.2 mm (8/32 inches). Short-shaft clock mechanisms are ideal for clock faces with a thickness of 1-3mm(1/25 inches to 1/8 inches), making them the perfect choice for thinner clocks. Accessory parameters: One iron hook, one rubber washer, one metal washer, one nut, battery not included. After-Sales Service: If you have any questions or concerns about the product, please feel free to contact us. Warm notice: Install hands in order (hour, minute, second) and keep them parallel for smooth operation. Avoid excessive force to prevent bending. Product description