Abstract: A variable pliers for clamping a C-shaped retaining ring comprises a main body, a pliers head, and two clamping rods. The main body is made up of two handles provided respectively at the front end thereof with a pivoting hole dimensioned to received therein a pivoting shaft. The pliers head comprises two clamping member, one of which is provided with a round protection having an axial hole dimensioned to receive therein the pivoting shaft. Another one of the two clamping members is provided with a through hole dimensioned to receive therein the round projection. The two clamping members are provided respectively with locating holes by means of which two clamping members are fastened with the main body in conjunction with the locating pins.