Cemented Carbide Pins, Carbide Studs, Tyre Nails We produce different sizes and different shapes of carbide pins, studs, nails, .used for shoes, horses, buses, trucks, autocycle, etc. Strict and tight tolerance at +/-0.05 mm. Grade material made by our own tungsten carbide powder factory, thus you'll get the most trusted quality with favorable prices of products. Samples and quotations will be given upon receipt of your enquiry.