1.Metal seal: The metal seal structure Bit is suitable for high-temperature and high-speed drilling conditions. It can be used in conjunction with a motor and has a long service life and high stability. 2.Gauge Protection: The double-row teeth arrangement on Gauge improves the gauge protection performance and prolongs the service life of the drill bit. The palm-back reinforced alloy teeth effectively protect the seal and oil storage hole,improve the stability of the drill bit,enhance th