Size: The total shaft length is approximately 20mm (0.79 inches), with a thread length of approximately 13mm (0.51 inches), suitable for clock dials 9 to 13mm (0.35 to 0.5 inches) in thickness. Accurate Time and Quiet Motor: This long shaft wall clock mechanism replacement provides high accuracy and reliability. It features a 6168s silent sweep second hand movement, ensuring no ticking noise and delivering a quiet environment. 7 Different Styles of Hands: This battery-powered clock movement set includes 7 pairs of clock hands in various styles and lengths, ideal for clock repairs, replacements, or custom DIY clock projects. Wide Application: This quartz clock movement repair kit is suitable for use in bedrooms, living rooms, offices, classrooms, restaurants, and more. Compatible with craft clocks, quartz wall clocks, and similar timepiece projects. Note: During installation of this quartz clock movement kit, ensure the hour and minute hands are aligned parallel and do not over-tighten the brass hex nut. Color: Black Material: Plastic + Metal Package Contents: - 3 x Quartz clock movement mechanisms - 3 sets x Screw accessories - 7 sets x Clock hands - 3 x Hooks The package includes only the items listed above; other products are not included. Note: Lighting conditions and display settings may cause slight variations between the color shown in the image and the actual product. Measurement may vary by +/- 1-3cm.