1.Certification:ISO&API 2.Size range from 3 7/8" to 17 1/2" 3.Material:Carbon Steel 4.Competitive price Type:PDC Bit Quick Detail Place of OriginTianjin, China (Mainland) Brand NameKingdream ,CS,LILINModel NumberCover all IADC CodeTypeDrill Bit Machine TypeDrilling Tool CertificationAPI MaterialCarbon Steel Processing TypeForgingUseoil drilling Bit bodyMatrixBlade5 Size3 7/8" to 17 1/2"Crown ...