The Brass F10 Portal Knuckle Weight - Low Offset is designed to enhance the performance of your RC vehicle by lowering its center of gravity. This product is a direct replacement for F10 portal knuckle covers, and it is compatible with both the plastic VPS08607 and the machined aluminum VPS8640 and VPS8641 F10 portal knuckles. Constructed from domestically sourced brass, these knuckle weights weigh over 120 grams, making them the heaviest options available on the market. This increased weight maximizes stability and performance during operation.