Welcome to our Linkedin Company Page! I am glad that you find us! Since year of 1971, our company started producing tapered button bits with government owned company. Through the past 50 years nearly, we grow and produce rock drilling tools with honest and belief. We can provide you as below: Tapered Chisel bits; Tapered Cross bits; Tapered button bits; Thread button bits; Down-the-hole (DTH) bits; Down-the-hole (DTH) Hammer; Drill pipe etc. If you have been thinking about to look for a new reliable and constant manufacturer or supplier of rock drilling tools, drilling bits, contact our team at kaiyu_bit@vip.163.com