The V-Force Designs 3x6mm Ball Stud Shim Set is a blue anodized tuning option that will add bling to your RC car or truck. These are made from CNC machined aluminum and anodized for a clean finish. Adjusting ball stud height can change the roll center and steering geometry. This set gives you three different sizes to allow for fine tuning to your chassis. Package includes twelve ball stud shims. Features: Four 0.5mm Ball Stud Spacers Four 1.0mm Ball Stud Spacers Four 2.0mm Ball Stud Spacers Specifications: Outer Diameter: 6mm Inner Diameter: 3mm