Rocking drilling tools button bit

1. rock drilling tools button bit 2. thread connection: R22 R25 R28 R32 R35 R38 T38 T45 T51 T60 ST58 ST68 threads. 3. diameter from 32 to 150m 4. our factory can supply 3000 pcs for per month . 5. our drill machine and bit main for mining ,include button bit , DTH bit , cross bit , chisel bit , coal cutting bit, drill rod , drill shank and so on . 6. our products had exporting all over the world ,such as Australia , US , UK , India , Iran ect. 7.we accept OEM order...