The hammer with stable performance and long service life. It is mainly suitable for karst caves, gravel layers, block stones and slightly weathered bedrock, and is widely used for pile foundations, water well drilling etc. The outstanding advantages as follows:

1. The structure without inner cylinder, simple structure, high reliability and easy maintenance;

2. It can drill hard rock and has high drilling penetration;

3. Produced by special steel, the rate of failure and crack is low;

4. There is a special fixed position for the gun suit, which is convenient for modification.