... Tungsten Carbide Button Rock Drill Bits for Drilling Product Information -Name:Tapered Button Bits for quarrying, mining, tunneling -Button No.: 4,5 ... and higher drilling efficiency. According to the tungsten carbide insert, button bits can be divided into ... design,number of buttons is 4,5,6,7,8,9,7 buttons is very popular for ... 3 0.37 42 73 2 0.4 9 Teeth tapered bits Description Diameter (mm) Length ...