China T51 89mm 102mm 115mm 127mm thread
2017-8-11 · T51 89mm 102mm 115mm 127mm thread button drill bit. T51 thread button bits are made with high quality of best quality alloy steel bar 45CrNiMoV and tungsten carbides tips YK05, through heat treatment so that it can withstand the toughest rock drilling demands, and transmit intensive impact energy into the rock with the least possible loss of energy.
Get Price