Carbide Button Style Rock Drill Bit, 1-1/2”, 28R-38R06, New: This features 7 carbide buttons and a 1-1/4” ID Rope Style “Z” mounting thread. It measures 4-1/4” long and comes from an older inventory in our warehouse. Carbide button bits prove to be more effective in very hard rock when using heavier classes of rock drills. This rock drilling bit head is sold with the Kent’s Tools 30 Day Satisfaction Guarantee.
