... : YG6, YG8 etc. 3. 100%raw materials. Carbide Tyre Pin/Nail1. Tungsten carbide tyre pin/nail.2. The grade: YG6, YG8 etc ... .3. 100%raw materials. 4. Various kinds of tyre pins.5. Made from Electrolytic materials.6. Special ingredient good ... weight.We produces a series Tungsten Carbide Pins for the tyre stud/spike, due to the application of the double-action ...