1.Flat,concave and convex faces 2.Simple structure 3 ... :Carbide Features: 1.applicable hard,very hard and medium soft rock formations. 2.Reliable quality, ... to ensure high drilling rate 4.Strict quality warranty and compensation rulesMarkets: Italy, France, Russia, Greece, ... Canada,Korea, Chile, Brazil, Nigeria, Mongolia and etc.Order guide:Dia.A+ Dia.B + Hammer typeRemarkShankGuideDia ...