Item information: 1. The upgrade parts are made of aluminum material by CNC 3D processed, by adopting whole shaped technology, the products have the characteristic of high intensity and durability. 2. The Aluminum Exterior Lock Rings just only fit Losi Super BAJA REY 2.0 1/6 original manufacturer tires and wheels, they also fit the Aluminum wheels we produce. 3. The lock rings come with stainless steel screws.