Macma Wet Stone grinder jig for Axe's. The jig firmly supports the axe, and enable you to sharpen it with a constant edge angle. The rotation of the stone presses the axe firmly into the jig and enhances the power from your hand giving the edge a suitable grinding pressure onto the stone. You will not get any snags into the stone that can easily occur if you grind free hand towards the grinding direction.
They are also compatible with other brand grinders that use a 12mm support bar.