The glamourous world of lutherie (BW)

[archipirata]

The little pin vise is part of a crack repair kit. You use the pin to make a tiny hole throughout the body at the crack location so you can feed a fine wire through then use the tuner and a wooden biscuit (cut with the biscuit bit) to clamp the crack shut top and bottom with the wire while the glue dries, then remove the wire and the only thing to fill is the tiny hole.