The Cauldron Jig is a 3 vane advanced fletching system. It provides the right amount of pressure for excellent adhesion, and you can fletch all three vanes at once so it's a big time-saver. The snap-in inserts are easy to change and don't require tools, so you can switch from a three degree right helical to a one degree right in no time. With this jig you can leave the nock on your arrow so you don't need to change the center post - simply twist the dial at the bottom of the jig to rotate your arrow for perfect indexing. The Cauldron pressure ring is adjustable with a single twist to accommodate micro, standard, and large arrow diameters. Cleaning is easy: the inserts can be soaked in acetone for an hour to remove instant glue residue. The Complete Cauldron includes inserts for Straight (gray), 3° right helical (black), 3° left helical (purple), 1° right offset (red), and 1° left offset (orange).