Inner Collet Holder is a Japanese precision machinery socket to connect the instrument and endpin straight at the center to produce amazingly clear sounds.
The radial cut collet chuck for precision machinery firmly holds the endpin from outside. Not like ordinary screw type sockets, Inner Collet Holder can hold the endpin right at the center. The structure holding the collet is made of duralumin aluminum with black alumite finish, representing a touch of class. The connecting joint to the instrument is made of ebony for easy attachment. Simply, turn the brass cap (gold color) to tighten and hold the endpin.
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