... in Hunan province. A professional Chinese manufacturer of tungsten carbide products such as indexable inserts shims, drilling bits, drawing ... dies, cold forging dies, carbide bars, carbide rods, carbide balls, carbide burrs, etc. Along with our company growth, we ... tools for rock and soil project, such as Hole Openers, Hammers & Hammer Bits, Drag Bits, rock drilling, etc.We ...