Product Introduction The R25 64mm Retrac Button Bit is a top hammer rock drilling bit engineered for quarrying, mining, construction and general rock drilling. With a 64 mm (2-1/2 inch) drilling diameter and a retrac skirt design, this threaded button bit delivers dependable performance in fractured or loose rock formations where tool retrieval and borehole control are critical. The retrac skirt reduces the risk of the bit becoming stuck or buried during drilling and helps