New Racing Innvovation for road vehicles. Racing nut or racing bolt with knurled ring. The screw or nut is much more grippy than a conventional part and used for racing. Screws and nuts are available in various sizes, colurs and threads. The screw heads are made of high quality anodized alloy . The screw made in steel 10.9. Further advantage the screw/nut can only be diesmantled with the special xl barracuda wheel adapter. In this combination also perfect wheel lock.