This is a jig for drilling lightweight holes in Mini 4WD gears. It allows you to evenly drill six holes. By drilling holes, you can reduce weight and improve responsiveness. ・Recommended drill: 2mm ・Compatible gears: Spur gears, crown gears ・Material: PLA ・How to use: Pass the gear through the shaft and set it in the jig. Attach the remaining jig and secure with screws. Drill six holes with a drill to complete. ・Handmade: Due to the 3D printing process, we have made efforts to print cleanly, but there may be individual differences such as layer lines and small sink marks (like dents) on the back. The product can be used without any problems. ＜Notes＞ This listing is for the processing jig tool (with fixing screws) only. Drills, shafts, and gears are not included.