ProTek R/C Lightweight Steel 48P Pinion Gears are an affordable pinion gear option that doesn't skimp on quality. CNC machined from hardened steel material, these precision cut gears are durable and are perfect for any 48-pitch application. Plus, the 18 tooth and larger gears have been machined on the back side to remove as much weight as possible, without sacrificing strength. Each gear includes a setscrew to make installation easy.