This dowelling jig automatically centers itself on any board from 3/8" to 2 3/8" wide.
It comes with two sets of removable bushings for hole sizes 1/4", 5/16" and 3/8", allowing you to drill two holes of the same size at one setting. An extra bushing set of these three sizes (one of each) is available separately.
Hole sizes 7/16" and 1/2" do not require bushings.
Made in USA.