1.Diameter: 127mm 2.Thread: T51 3.Color: Red 4.Button Bits: 19 buttons Thread button bits made with high quality of best quality alloy steel bar and tungsten carbides, 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.According to different drilling application, we have different design to meet customers with good quality and good price .
