1.Flat,concave and convex faces 2.Simple structure 3.Easy operation 4.Certificate: ISO9001:2008, SONCAP 5.Material:Carbide Features: 1.applicable hard,very hard and medium soft rock formations. 2.Reliable quality, long service life, rare abnormal breakage during service life. 3.Good flushing effect to ensure high drilling rate 4.Strict quality warranty and compensation rulesMarkets: Italy, France ...