... sale 2)Min. Order: 2000 pieces 3)Type:X,XX,EX,EXX,EC,ECC,ESF,ESSF,ESD,ESSD,EY,EYY Dingrun ... stage cross-cut drill bit Φ110 Φ110 Φ130/Φ175/Φ200 EX Cast hardened cross-cut drill bit Φ42/51 Φ51/Φ76 ... Φ76 Φ76/90 General Introduction Jiangyin Dingrun Precision Steel Tube Co. Ltd. (JYDR) is one of the leading manufacturers, exporters and importers ...