... companies in making diamond tools in China. with more than 50 experience in making diamond ... with you and do hope to let all the people in world to know our JIANGSHAN brand diamond tools. 1. single tube ... bit and reamer:Φ28,Φ36,Φ46,Φ56,Φ59,Φ60,Φ66,Φ75,Φ76,Φ91,Φ94,Φ110 etc. 2. Double tube ... composite slice bit,diamond oil bit Diamond single-tube bit and reamer Nominal sizeBit Reamer Screw ...