The series adopts principles of electric combining with pneumatic to complete revolving-open. It has the following advantages: smooth running, no impact, noiselessness, high quality and smooth surface, so it is especially suitable for the production of precision machinery industry, such as core of radio-recorder, camera, clocks and watches and wireless.

The series has complete functions, can revolve-open countersunk head, cup head, cylinder head and spherical cylinder head rivet and hollow rivet.