R32 Threaded Button Bit 43 Mm Drill Diameter Semi-Ballistic Carbide Profile Top Hammer Drill Bit For Drifting And Tunneling The Q7-43-R32 threaded button bit is a reliable top-hammer rock drilling tool engineered for routine drifting and tunneling operations. Built for consistent performance in demanding underground conditions, it delivers stable penetration and dependable service life. Technical Specifications Q7-43-R32 threaded button bit — key parameters Thread Type R32