Product Introduction The T38 64mm Retrac Button Bit is a threaded top hammer rock drilling bit engineered for mining, quarrying, tunneling, drifting and construction drilling applications. With a T38 threaded connection and a 64 mm bit diameter, it is designed for compatible T38 drilling systems where reliable penetration and efficient cuttings removal are required. The Retrac skirt design is particularly useful in fractured, fissured and broken rock formations. It helps