There are 11 specifications: TH68, TH79, TH85, TH98, TH122, TH139, TH180, TH220, TH275, TH398 and TH600. They can be matched to various types of hammers popular in the world and drill the holes from 76mm to 1200mm in diameter.
 
They are widely applied to all kinds of rock boring hole drilling and excellent in projects for casing system and water well drilling. The simple structure ensures the easy operation and maintenance. The good seal effects eliminate the problems caused by water and flushing entering into the inner cylinder of hammer. They also have the features of large impact power, smooth and stable speed, and long service life.