(H)S headless guitar single unit bridge Our headless single unit bridge for guitar is entirely made of billet brass for strength and sound transmission, with the exception of the tuning knob which is in black anodized aluminum. The tuner has strings clamps for ball-ends or with an hex grain, depending on the clamping option. It is possible to adjust the height of the string, the intonation and the tuning fork. It comes with mounting screws and Allen wrench.