This is a manual motor cleaning tool for Mini 4WD. It is equipped with a 1:48 speed increaser. For example, if you turn the handle at a pace of 2 times per second, it will rotate at 5760rpm. Since no power supply is required, it is safer compared to the conventional power-on type. The direction of rotation is forward for FM cars when turning the side with the F marking, and forward for rear motor cars and dual-shaft cars when turning the side with the R/C markings. It is convenient for cleaning when the commutator gets clogged during running or during motor break-in. By setting bearings on the pins of dual-shaft motors, you can also clean the bearings. If the included motor fixing band is damaged, you can substitute it by connecting three 19mm roller O-rings. Please prepare the countersunk screws, nuts, and spacers to be used for the handle, as they are not included. Material: PETG-CF *For the cleaner used for cleaning, we recommend a parts cleaner that can be used on plastic, etc. We tested WAKO'S BC-9 and Gallium Cleaner 300, and there were no problems. Because it may deteriorate if exposed for a long time, remove the holder after use and store it with the cap that came with the bottle. *We will ship within 1-2 days after purchase. We will contact you if it takes more than 2 days due to work circumstances. *Because it is a 3D printed product, there may be small scratches or layer marks that occurred during finishing. Thank you for your understanding. Search Keywords Motor Bearing Break-in Oil Cleaning Jig Power Dash Sprint Mach Piper Power Dash Motor Sprint Dash Motor Mach Dash Motor Piper Dash Motor Saito Store