Time saver, for Sigma, Martin, Shenandoah, & kit Martins
A little filing, setting the slots to the right depth, and I had a new nut on a Martin in about 20 minutes. The slots could maybe be used as is, but I took them down to a medium low action. The string spacing is a little narrow, by 1/64th inch on either side, for the 1 15/32 spacing. I would not use it for the 1 17/32 wide neck Martin, but for the narrower ones, it is a real time saver.
Reviewed by: (Verified Buyer) Seth Burgin from Arizona.