... of flat head studs/ tungsten carbide tire studs in car for Motorcycle, ATV, Farm, Tractor: GRADECoHcDenRSHV30GRAIN SIZEJX0197.5-9.011 ... of 100% quality guarantee customized tungsten carbide tire studs, tyre nails :Chemical composition: WC-80%+Co-10% Density: (g/cm3 ... different sizes and different shapes of tungsten carbide pins, studs, nails for the tyre stud, spike, shoes, horses, buses, trucks, etc. ...