CIR90 95mm CV Convex Face Semi-Ballistic Button Bit - DTH Rock Drill Bit The CIR90 95mm CV Convex Face Semi-Ballistic Button Bit is a high-performance DTH drilling bit designed for efficient rock drilling in mining, quarrying, construction, and rock excavation applications. It features a 95mm bit diameter, convex face design, and semi-ballistic button configuration for balanced penetration, efficient rock breaking, and reliable drilling performance. The carbide button layout