Features: 1. Fast drilling speed and low air consumption, lower oil consumption due to inner structure of DTH hammer designed according to newest rock drilling theory. 2. Energy-saving and more durable due to high quality alloy steel materials and advanced processing technology adapted. 3. Low problem rate and easy to maintenance due to simple, reliable and easy assemble and disassemble inner structure of hammer. 4. Good sealing effect to prevent water and rock cutting entering to the hammer.