Attachment adapted for use with different necklaces

An attachment device of the type designed for connection to at least one portion along the length of a necklace, said attachment device comprising:

• (a) a casing including two sockets disposed in contiguous relation to one another and configured to receive a length portion of a necklace therein, a cylindrical casing wall having a substantially continuous configuration substantially defining the boundaries of each socket,
• (b) each of said sockets including a closed end and an open end, said open end dimensioned and configured for passage of a necklace length portion laterally therethrough,
• (c) locking means movably mounted on said casing and structured for at least partial covering of said open end of each socket to retain said length portions in said sockets,
• (d) passage means formed in each socket and configured and disposed for extension of a said length portion out of opposite sides of each socket,
• (e) said passage means comprising two channel apertures formed in said casing wall of each socket, said two channel apertures of each socket disposed in substantially aligned relation to one another and each channel aperture comprising a predetermined configuration structured to selectively receive and hold in generally fitting relationship any one of at least two of said length portions of different cross-sectional configurations, whereby any one of a plurality of necklaces of different configurations may be closely maintained within said sockets of said attachment device.