This is hicoo tungsten carbide products coltd We can offer Different type of Coal-Cutting tips. For example: Type HCM10/ Type HCM11/Type HCM12/Type HCM13/Type HCM14/Type HCM15/Type HCM16/Type HCM17/Type HCM20/Type HCM21/Type HCM22/Type HCM23/Type HCM24/Type HCM25/Type HCM26/Type HCM27/Type HCM28/Type HCM29 and so on. And these kinds of tips are using for Coal mining bits, salt mining bits, mining bits etc Whats more, we can do them according the customers chemical compositions. For additional products information, please check www.tungstencarbide.com.cn