Roller bit is the ideal tool for hard rock drilling, especially high UCS and RQD, UCS above 100Mpa, which normal core barrel with bullet tooth, hard to get production. The drilling cost per meter is high. 
Firmtech provides one -stop solution for rock drilling. provide 4 type roller bit for selection and give proper welding instruction to ensure the precise position and get ideal drilling performance. furthermore, Firmtech gives the design of core barrel which can ensure drilling efficiency.