2-Piece Collet. Fits TLC-X / VLC-X / TLC-X Air pushing rod. When using the collet, a standard opening Your-Skin Cone can be used, although the clearance is tight. The wide-opening Your-Skin Cone is supplied with all but the narrowest devices.
Note: The first picture above shows what this item includes. Other pictures may show size options or possible applications employing optional components.