The 1UP Racing Heatsink Bullet Plug Grips with 5mm Bullets (Black/Red) are designed to improve the performance of high-powered electric radio-controlled (RC) vehicles. These grips are made from high-quality materials that are designed to dissipate heat, which can build up in the battery connectors and cause performance issues. The included 5mm bullets are compatible with most high-power RC batteries and are designed to provide a secure and reliable connection. The black and red color scheme is stylish and gives the vehicle a custom look. These Heatsink Bullet Plug Grips are a must-have for anyone looking to upgrade their RC vehicle for improved performance and reliability.