Features 1、Good Compatibility: This RC pinion gear is compatible with popular brands like for hsp, for xial, for traxxas, for Redcat, and more, making it suitable for a wide range of motorized applications. 2、3.175mm Shaft Diameter: The RC car motor gear comes with a 3.175mm (0.125in) shaft diameter, providing a secure fit for compatible motors and ensuring optimal power transfer. 3、Excellent Steel Powder Alloy Material: This motor gear is made of excellent steel powder alloy material, which is sturdy and wear resistant, not easy to be damaged and has a long service life. 4、Hard Anodised Surface: The surface of this RC pinion gear features a hard anodised treatment, which prevents rust and prolongs its service life. 5、CNC Processing: This metal pinion motor gear replacement features CNC processing, which allows for smoother rolling and more stable performance. Item Type: Motor Gear Material: Steel Powder Alloy Module: M0.6 Shaft Diameter: Approx. 3.175mm / 0.125in Use: Compatible with for hsp, for Axial, for traxxas, for Redcat and other brands. Package List 3 x Motor Gear 3 x Set Screws