These is Hicoo Tungsten Carbide Co., Ltd. These kinds of tips are using for Coal mining bits, salt mining bits, mining bits etc We have many years' experience to supply Chinese and foreign Market tungsten carbide products with high-quality and the most competitive price . If you are interested in any product or have any question about that, Please feel free to come back to our company MSN chinahicoo at hotmail.com or Tel. If you would like to learn more information about my company, please check