Hydra - High performance replaceable head drill featuring solid carbide heads and HSS body.
Interchangeable solid carbide head drills for high performance machining of steels, stainless steels and cast iron. Proven in drilling structural steel beams used in the construction industry.
One of the most reliably accurate interchangeable head drills available. Fail-safe head location can be changed without ejecting the drill from the machine. Available with coolant feed across the full range and a choice of HSS bodies to support drilling to 3xD, 5xD and 8xD:
http://www.dormerpramet.com/en-gb/products/hole-making/solid-drills/hydra-solid-carbide-replaceable-head-drills