The turned handles that I use in my shop start with an octagon blank that has taken up to 3 hours to prepare an accurate one. This jig is designed to reduce that time to mere minutes. I start with a split blank and in just a few minutes with this jig end up with a perfect octagon blank. The jig will also accommodate a taper up to 30” long. What you can’t see in the picture is a runner that runs in the miter slot.
-- Dan Krager, Olney IL http://www.kragerwoodworking.weebly.com Instructions are that which will be read as a last resort.