Drill Guide Dowel Kit Jig with 6 Bushings 3/16&rdquo;, 1/4&rdquo;, 5/16&rdquo;, 3/8&rdquo;, 7/16" and 1/2&rdquo; Drill perpendicular holes on flat edges, spheres, cylinders and corners 3" see-through square base Includes bushing sizes 3/16, 1/4, 5/16, 3/8, 7/16 and 1/2" Includes centering pins