You can adjust the Drill Guide in 5 degree increments from 0-45 degrees, left and right. V-Guides for drilling through rounded stock or dowel, positive stop for accurate drill depth and centering channel on base for edge drilling. Attaches to all 3/8" and 1/2" power drills. Folds for tool-box storage. Includes: 1/4", 5/16" & 3/8" brad point bits.