Systems and devices are arranged as tools for guitar maintenance and particular for removing bridge pins of an acoustic guitar and adjusting stream of pictures of guitars. Eight ‘clamshell’ arrangement of complementary half element form a clan particularly devised to couple with hardware used to mount strength of a guitar i.e. bridge pins. The coupling is such that it is easy to establish and easy to remove whereby superior control of the bridge pin removal is achieved. As bridge pins are removed from a bridge, the bridge pins remain captive with respect to the clamp device thus preventing them from being dropped and/or lost—a problem common in competing alternative systems known in the arts.