zhejaing kaiyu drilling bit co., ltd has long experience on rock drilling process and the latest development of rock drills. We export our products worldwide to more than 30 countries. 90% of its turnover is exported. Mining, quarrying and construction customers drive the company's strategy. Our white bits are known in all the main mining and construction customers all over the world. Our tight focus and continuous development work secure the latest technical solutions for the most demanding rock conditions and for the most powerful rock drills, all for the benefit of our customers. With top quality Scandinavian steel for its products, and proven homogenous tungsten carbide for its buttons, we lay the foundation for an exceptional standard of finished drill bits. We have passed ISO 9001:2000 qualities administer system certification.New centuryKAIYU brand's series of product hope and everywhere new old friend joint hands altogether enter, again cast resplendency!Product lines:Rocktools - Button bitsRocktools offering covers all construction, quarrying and mining drill & blast applications from soft to hardest rock conditions. Mining is one of the most important customer segments for Taizhou City Metallurgical Tool Factory and applications like drifting, cuthole, bolthole and production drilling are well covered. Also major tunnelling and quarrying customers have approved Robit quality worldwide. Threaded button bits cover following drilling applications: 1) Mining bits2) Chisel style bits3) Cross style4) Down-the-hole bits5) Tunnelling bits6) Quarrying bits7) Bench drilling bits8) Dimensional stone production Ground drilling toolsOur ground drilling tools offering covers following applications: 1) Tube umbrella drilling 2) Anchoring 3) Piling 4) Horizontal drilling