Replacement replacement part compatible with 64 kinds of plastic shafts. Designed for single layer and double layer applications, this set of crown and worm cog wheels serves as a direct replacement for decorative gear mechanisms and small mechanical assemblies. Key benefits Restores function quickly: replaces worn or broken cog wheels and shafts to bring decorative mechanisms back into service. Versatile fit: compatible with 64 different plastic shaft types and usable in both single layer and double layer gear layouts. Simple installation: straightforward replacement design reduces time and keeps projects on schedule. Clean appearance: cog wheel design intended for visible decorative use as well as concealed mechanical applications. What this part does Functions as a replacement crown or worm gear for decorative mechanisms and hobby assemblies. Supports single layer and double layer shaft arrangements to match common design layouts. Provides reliable meshing and alignment for lowload rotational motion in decorative items and lightduty mechanisms. Important attributes Compatibility: Designed to work with 64 kinds of plastic shafts and common shaft profiles used in decorative gear assemblies. Function: Crown gear and worm gear options for single layer and double layer installations. Material: Manufactured from plastic suitable for decorative and light mechanical use. Performance: Intended for smooth, lowload rotation and consistent alignment in decorative applications. Practical applications Decorative clocks and moving displays: worn decorative cog wheels to restore motion and appearance. DIY models and craft projects: use as replacement parts in hobby builds that require crown or worm gear elements. Small decorative mechanisms and novelty items: gear trains in lightduty assemblies where appearance and basic motion are important. Installation and care Match the replacement part to the shaft profile and layer configuration before installation. Clean mating surfaces and remove debris to ensure proper seating and smooth rotation. Avoid torque or continuous heavy loads; designed for decorative and lightduty mechanical use. This replacement part is a practical choice for repairing and maintaining decorative gear mechanisms and light mechanical assemblies that use plastic shafts in single or double layer configurations.