Due to many requests for a Prius-compatible grip, we've created this using a special nut to accommodate M6, which was previously impossible due to the Φ7 opening. This is a tapped Mac Tools driver grip (DGS2), M6 P1.00mm. For multiple purchases, please use the bulk purchase function. You will receive a ¥100 discount per item. Please select one color from the five colors in the first photo and specify the color in the transaction email (black, green, red, yellow, orange). *Black, green, orange, and yellow have the new logo. The third photo shows other M6-compatible grips that are also for sale. As a precaution during installation, completely remove any thread locker attached to the male threads on the vehicle side. The nut embedded in the shift knob is the same type used for camera tripods. To prevent it from coming loose, we've applied Loctite and adjusted the pilot hole depth to prevent it from going in too far. However, the fixing method differs from cameras, so forcing it may cause the nut to move. A locking nut is also included (you don't have to use it). Using it will increase the overall height by the thickness of the nut. The height of the grip is approximately 40mm. Although it is new, it has been modified, so it is treated as used. We can accommodate changes to thread diameters such as M10 and M12 (please inquire via comments). Other colors and dimensions are also available. We also sell Mac Tools grip keychains that can be attached to cars and motorcycles. We generally ignore requests for price reductions.