Adjust tune-o-matic bridges quickly without loosening the strings - using the same tool Gibson used in their original Kalamazoo factory. Lift a tune-o-matic with this jack and you can adjust the thumbscrews up or down freely, and without pressure from the strings you'll no longer damage the plating on the hardware.

With this bridge jack, you can even hold the guitar in the playing position and jack up the bridge with one hand while watching the 12th-fret action - when it looks right, spin the thumbwheel to hold that height.

Use from either side of the bridge. Can also be used to raise the upper part of archtop and mandolin bridges.

Pricey, but I find it invaluable in the workshop. Of course, you could always heat up and grind an old file to the same shape.... .