Hot Racing Radio HSF10X07 17mm Flux Warlock Hex W Serrated Nuts Savage Flux Control Parts CNC machined Billet aluminum construction Purple and black anodizing for durability, corrosion resistance, and great looks 17mm wheel Hex; - +5mm hub extensions (each side) for greater stability over any terrain Large Serrated and captured aluminum wheel nuts with 17mm Hex Six-slot wheel support reinforcement ring cups