Lie-Nielsen sharpening jig

These jigs are made to set the angle for Lie-Nielsen honing guide.
the 20-50 version has these angles: 20, 30, 35, 40, 45, 50
the 23-50 version has these angles: 23, 25, 27, 30, 35, 50

There are screw holes to screw it down to a piece of plywood or bracket that can hang off the end of your bench.