Size: The total shaft length is approx. 20mm / 0.79 inches, and the thread length is approx. 13mm / 0.51 inches, fits clock dials 9–13mm / 0.35–0.5 inches in thickness. Accurate Time and Quiet Motor: The long shaft wall clock mechanism replacement offers great accuracy and dependability, equipped with a 6168s silent sweep second movement, no ticking, and provides a quiet environment. 7 Different Styles of Hands: This battery clock replacement mechanism set includes 7 pairs of different pointers and lengths, ideal for repairing clocks, replacing clock movements, or creating custom clock projects. Wide Application: These clock repair replacement part kits can be used in bedrooms, living rooms, offices, classrooms, restaurants, etc., suitable for craft clocks, quartz wall clocks, and more. Note: When installing this quartz clock movement kit, keep the hour hand and minute hand 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 Note: Light shooting and different displays may cause slight color variations between the item in the picture and the actual product. Measurement allows an error of +/- 1–3 cm.