1.Using over 99.95% high purity tungsten carbide powder, it has a better strength and hardness combined with a longer service life than the normal one. 2. Using ultrafine grain size of tungsten carbide powder to produce,Hardness can reach to HRA93.6, Bending strength can reach to 4000N/mm² 3.Tolerance can reach to ±0.001mm, straightness can reach to ±0.02mm