... China. with more than 50 experience in making diamond bits and reamers and grinding wheels, we can produce the diamond tools according ... world to know our JIANGSHAN brand diamond tools. 1. single tube bit and reamer:Φ28,Φ36,Φ46,Φ56,Φ59,Φ60,Φ66,Φ75 ... diamond bit, composite slice bit,diamond oil bit Diamond single-tube bit and reamer Nominal sizeBit Reamer Screw thread Exteral diameter Internal ...