... partly 2.5mm 3. suitable for soft-medium formation's JSRTC series is the main force product in the domestic market during ... partly 2.5mm. It is suitable for soft-medium formation’s drilling. It possesses excellent resistance, shock resistance. ModelSpecification size( ... .2813.28our company has various PDC cutters ,such as JSRNC series ,JSMC series,JSRTCseries, JSZF,JSHF,JSWF,JS1308-DT.JS1305-DT,JS1304 ...