A sturdy metal bridge marker for accurate positioning of the string slots on any bridge from 1/8 size violins up to 4/4 cellos.
Two screw clamp holes allow the bridge marker guide to be held securely in the relevant position.
The upturned bridge is then centered on the rails and rolled gently from side to side leaving correctly spaced nicks ready to file for the string slots.
Comes with full instructions.
An essential tool for any luthier.