The AccuDrill Precision Drill Guide adds a whole new level of accuracy to your standard power drill. The AccuDrill is great for angle drilling doweling plug cutting and even edge sanding. With the easy-to-use protractor scale you can adjust the Drill Guide in 5 degree increments from 0-45 degrees left and right. In addition V-Guides on the base permit drilling through dowel or other rounded stock. Attaches to all 3/8" and 1/2” power drills. Folds for tool-box storage. • For use with 3/8" and 1/2” power drills. • Includes 3/8" capacity chuck with key. • Protractor scale adjusts body from 0-45 degrees left and right in 5 degree increments. • V-Guides for drilling through rounded stock or dowel. • Positive stop for accurate drill depth. • Centering channel on base for edge drilling. • Folds flat for storage.