YT23/7655 is an economical rock drill with powerful torque andpercussive forces, and it is designed for long hole drilling.Its powerful torque and percussion, generated by the long stroke mechanism and the high efficiency tubular valve, enable a superb performance for drilling down to about 6 m and is making the drill efficient in hard rock. The design of YT24 makes it drill fast and efficient and the machine is also durable and easy to handle.