1. This level of hex wideners is having a broad width of 23mm in order to make a wider wheel distance for stabilization. 2. This few hex wideners is having 5mm area which can be usually appropriate several other models providing the sizes are fit. 3. you will discover o-ring a comparable component and springtime metal musical company, springtime with washers, stainless screw in the reverse part of tense up the hex wideners from free away with a geniune delrin collar purchase secure the hex constantly constantly set up meaning your tires and tires won't spin around, specifically through crawling track your Axial SCX-10 II can face countless traction.