Product Introduction The T38 76mm Retrac Button Bit is a threaded top hammer rock drilling bit engineered for mining, quarrying, tunneling, drifting and construction drilling applications. Featuring a T38 threaded connection, a 76 mm drilling diameter and a Retrac skirt design, it is built for demanding rock drilling conditions, particularly fractured, fissured and broken formations. The Retrac design helps improve drill-bit retrieval and reduces the risk of the bit becoming