The present invention is an improvement of the pliers for instructors, and is formed in a circular ring, and the connecting portion 2 is formed at one side in the thread guide portion 1 'having the opening portion 1c at one side, and the recessed grooves 3 and 3' at the upper and lower surfaces thereof. ), And the ceramic thread guide (1) made of a ceramic hole (1a) having a hole (3a) formed inside the recessed groove is attached to the bent portions (5a) and (6a) of the shell (5) and (6). (5 ') (6') is inserted into the rotor (4) concave groove to weld (7) to the surfaces that are in contact with each other, so that the thread guide is durable and the pliers do not have to worry about being loosened from the rotor. It is possible to perform.
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