1. This wide range of hex wideners is having a complete width of 23mm to obtain a wider wheel distance for stabilization. 2. This few hex wideners is having 4mm opening that may be suitable for countless other models provided that the sizes are fit. 3. you will discover o-ring utilizing one component and springtime steel musical company, springtime with washers, stainless screw in regards to the reverse aspect of tense up the hex wideners from free and a geniune delrin collar devote to secure the hex constantly in place and so the tires and tires wont spin around, particularly through crawling track your particular Axial SCX-10 II can face adequate traction. Them includes :