Akeda 3220 is a set of 20 Degree Through Dovetail Pin Guides. The package has five 20º pin guides used to form through dovetails in 1/4-Inch thick material with the matching angle 20º bit. The 20º angle is better suited to material 1/4-Inch thick. It’s stronger than the 14º angle, and forms a more slender, aesthetically-pleasing pin profile. When installing guide fingers for the first time, they may be a little stiff. They are deliberately made slightly oversize so they shave down to size.