The next time you’re away from your drill press and need to drill perpendicular holes, grab one of these plastic drill guides. They’re little jigs that make it easy to drill perpendicular holes on the face and edges of flat boards, center holes on round stock, and even drill straight through the center of spheres.
Made with a clear impact resistant housing, the drill guide accepts bushings for drilling 3/16″, 1/4″, 5/16″, 3/8″, 7/16″, and 1/2″ holes. The hardened steel bushings are included with the kit along with a center punch that doubles as a locating pin.
Several retailers sell similar drill guides to the one manufactured by Woodstock International for $12 to $14 — cheap enough to throw in your toolbox until you need it.