Silent clock movement:the clock movement adopts super silent design, the clock movement rotates without noise, providing a quiet environment for your sleep. Accurate time, one piece can be hung, DIY wall clock. This clock mechanism is battery operated, low power consumption, only need 1 AA battery (not included).<br> Material: plastic, quartz, aluminium, metal. Battery type: AA carbon batteries (not included). Thread length: 5mm/0.2inch. Mechanism shaft length: 12mm/0.47inch. Mechanism box size: 56x56x16mm/2.2x2.2x0.63ianch (LxWxT). Suitable for clock face thickness: 2-3mm/0.078-0.12inch.<br> Installation instructions: 1. Insert the movement into the clock face slot. 2. Install the washer and nut on the movement shaft. 3. Place the hour, minute and second hands in sequence at the twelve of the clock position.<br> Applications:The DIY clock mechanism replacement kit is a great replacement. Suitable for cross stitch, three dimensional embroidery, craft clocks, frameless drawing clocks and so on. Suitable for repairing and replacing, also suitable for DIY various styles of clock frames.<br> Note: Please check the size of the battery clock mechanism you purchased to verify that it can fit your clock. Do not exert too much force during installation, otherwise it will bend.