Applications and features: applications :Applocation Formation:Hard and compact formation with very high compressive strength,and some abrasive layer’s such as Calcareous shale.Sandstone. Features :Double cone crown and heavy cutter density are designed to drill abrasive and hard formations .Triangle TSP with high wear-resistance and self-sharpen capacity increase the bits ROP and duration. http://http://www.greatpdcbit.com/Product-78.html