Size: Total shaft length: 8mm, without thread Total shaft length: 14.5mm, Thread length: 6.7mm Total shaft length: 17mm, Thread length: 9.7mm Total shaft length: 20mm, Thread length: 11.7mm Total shaft length: 22.5mm, Thread length: 14.5mm Total shaft length: 28mm, Thread length: 19mm Total shaft length: 31mm, Thread length: 24mm Wide application: Suitable for cross-stitch, three-dimensional embroidery, craft clock, frameless draw clock, and specially suitable for DIY quartz wall clock replacement movement parts. Good DIY clock supply: Ideal for repairing or replacing broken clock parts, or as a material for handmade clock projects. Specification: Material: Copper, Plastic Power requirement: Requires 1 piece of 1.5V AA battery (battery not included) Package Includes: 1 Piece Quartz Wall Clock Movement