This is the Metal Gear Set for the Hitec HS-85MG Servo (HRCM3415). FEATURES: Replaces all worn gears inside servo. INCLUDES: One Metal Gear Set for the Hitec HS-85MG Servo with 1st, 2nd, 3rd, 4th and 5th gears plastic spacer, and 2mm x 4.5mm phillips head screw. REQUIRES: Phillips screwdriver to open servo case. Removing old gears and replacing with new ones. JXS 7/02/02 ir/kh