The Versa-Block from Eagle Jigs has been around for a while, but it’s still a neat solution to pack 16 different precise measurements into one octagon-shaped jig. You’d use it primarily for setting bit and blade heights, but the octagon shape also measures 45º, 90º, and 135º angles.
Eagle Jigs CNC-mills the Versa-Block from aluminum and anodizes it. The three stacked octagons provide measurements ranging 1/16″ to 1″ in 1/16″ increments. On one side you’ll find 1/8″, 1/4″, 3/8″, 1/2″, 5/8″, 3/4″, 7/8″, and 1″, while the other has 1/16″, 3/16″, 5/16″, 7/16″, 9/16″, 11/16,” 13/16″, and 15/16″. The measurements for the side facing up are listed on the outer circle, and the ones for the side facing down are on the inner circle, so you don’t have to flip it over to look.
Woodworking Online has a short review of the Versa-Block on its website, along with a better picture. You can pick up a Versa Jig on sale at Eagle Jigs now for $30 before shipping.