R32 76mm Reaming Button Bit - Heavy-Duty Threaded Rock Drill Bit Engineered for precision hole enlarging and bench drilling, the R32 76mm Reaming Button Bit delivers superior penetration rates and extended service life in demanding rock conditions. Featuring high-grade tungsten carbide inserts and a robust forged alloy steel body, this bit ensures efficient chip removal, straight hole alignment, and reduced downtime during underground mining, tunneling, and construction