Founded in 1986, Chuanshi Chrida Diamond Bit Co. Ltd. (hereinafter CSC) is a leading manufacturer in China with the most extensive scope of PDC bits and natural diamond bits. With advanced equipments, CSC adopted American Hughes Christensen's advanced technology and manufacturing process to produce various series of drilling and coring diamond bits(including some types of special bits) with size ranging from 3-1/2â to 17-1/2â. The design, manufacture and inspection standards are carried out under the guidance of the advanced diamond bit technical specifications. Meanwhile, CSC is an authorized API manufacturer. The products all have passed the API specification 7 and awarded the ISO9001:2008 quality management system certificate.