Accessories:Protection Plate-1pcsStainless Steel Flat Head Screw 4x12-2pcsStainless Steel Flat Head Screw 4x14-2pcPart location:Bottom of front chassisDoes this product replace a specific part or function?yesProduct major function & usage:The front chassis is constantly rubbing on different surfaces, all the friction would wearout the chassis itself and the gear will be exposed and eventually be damaged. This part is a great protection for the front chassis and avoid any damage on the gear.