Feature: 1. STEEL GEAR: The gear is made of hardened metal steel, with strong wear resistance and long service life. 2. FINE WORKMANSHIP: Compared with other small gears, good mechanical processing can reduce roughness and noise, thus making the small gears roll smoothly. 3. EASY TO INSTALL: Easy to disassemble, allowing for direct replacement of original plastic or damaged parts for higher strength. 4. ALUMINUM ALLOY SHELL: Gearbox housing is made of premium aluminum alloy material, which is durable. Aluminum alloy material is lightweight, strong strength, and not easily damaged. 5. APPLICABLE MODEL: This gearbox set is suitable for ARRMA VORTEKS, for Big Rock, for OUTCAST, for KRATON, and other RC cars. Specification: Item Type: Gearbox Housing Gear Set Gearbox Material: Aluminum Alloy Gear Material: Steel Number of Gear Teeth: 57T Applicable: 1/10 for ARRMA VORTEKS, for Big Rock, for OUTCAST, for Kraton and other RC car . Package List: 2 x Gearbox Housing 1 x Gearbox Accessory 5 x Screw 1 x Gear