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Shoulder drive drilling rod,hollow steel drill rod,

Length:300mm-4270mm

thread type:E16/D30/H25

Hex 25 and Hex 22

Liaocheng Uniondrill rock drilling tools Co.,Ltd is a professional rock drilling tools manufacture in Shandong China,it is established in 2010.our products' quality is very good,because we have many experienced technical people and use the best material.by now,we export to more than 30 countries include Russia,Chile,Australia,South Africa,Turkey,Malaysia and so on.we can manufacture hollow hexagonal steel bar,tapered button bit,cross bit,thread button bit,R22,R28,R32,T38,T45,T51,T60,ST58,ST68,GT60,DTH bit,drifter rod,MF rod,Extension rod,coupling sleeve and shank adapter.and we can also manufacture other products according to customers drawings.