The ABM 3901 Single String Fine Tuner Headless Bass Bridges are used extensively in multi-scale instruments, using one bridge per string allows for complete freedom of scale length choice and string spacing and the built in tuner means you don't need a heavy headstock and so no neck dive. These good looking, premium quality bridges are machined from solid brass and the smooth edges sit well against the hand when palm muting. The ball end of the string mounts in to the tuning mechanism at the back of the bridge so no need for special strings and then the string runs over the saddle as normal, you simply rotate the knurled knob at the back of the bridge to tune the bass. The saddle block can be moved forwards and backwards to adjust intonation and is height adjustable, a set screw locks the block in position once set. Priced per single bridge.