Features: Permanent Steel Constructparticlemail: Constructed from heavy duty steel, the screw gear assembly ensures durability and stability, offering better wear resistance for frequent use in device dolls. Smooth Transmission Knowledgemail: Upgraded screw gear plan enhances transmission efficiency, reducing resistance for polisher action, ideal for accuracy hurrying circumstances. Easy Installatparticlemail: Developed for quick and bother complimentary installation lacking complex tools, making it starter friendly and suitable for various device toy models. Permanent Executparticlemail: Steel substance furnishes excellent oxidation resistance, extending the product’s existence and reducing the need for frequent replacements. Wide Agreement: Universally compatible plan backs multiple trademarks and models of device dolls, offering consistent transmission repairs for different varieties. Specifications: Substancemail: Steel Processecond: Accuracy machining, wear immune plan Package Includes: Helical tooth assembly × 1 Steel screws M3×10mm×4 Steel nut M3×4 Chinese and English bilingual installation guide ×1 note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.