... bitNear bitDrill stringNear bitDrill stringTopDownTopDown6152.412151800~9001,000~1,1001,200~1,4001,400~1,600NC38NC38NC383-1/2REG6-1/4158.76 ... ,2001,2001,5001,8002,000NC566-5/8 REG6-5/8REG17-1/2444.51,200~1,3001,200~1,3002,000~2,2002,000 ... ~2,200NC617-5/8 REGAny question,please contact ...