R25 shank rod mean the end of the Hex 22 is shank Hex22*108 mm , the other of the end is the thread R25 , It can be connected with the thread R25 drill bit ,the diameter of the drill bit we can provide from 38mm-50mm , we choose high quality tungsten carbide and steel , use CNC to produce all process to make sure the products perfect ,We can also provide HEX 19mm and HEX 25mm shank rod , we will try our best to make our customer satisfied , Give us a chance ,we won't let you down ,
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