FanRC 4.3mm Ti Ball Studs Fits Yokomo 94-97 YZ10 870c 93WCS MX4 WCS, and MX4 prototype - FZ-0503 These ballstuds come with a 2mm hex driver hole to prevent serrated surface scratches. Made of Gr5 TiFanRC 4.3mm Ti Ball Studs Fits Yokomo 94-97 YZ10 870c 93WCS MX4 WCS FZ-0503SKU: FZ-0503$17.00PriceQuantity*Add to Cart