Milescraft 1318 DrillMate Drill Guide with Chuck Perfect for straight or angled drilling, drilling on the edge of a board or on round stock Attaches to all 3/8" and 1/2" power drills and it also includes a 3/8" capacity chuck with key Angle cuts of 45 degree to 90 degrees, with a built in angle read out in the all metal base Centering channels built into the bottom of the base, to accommodate drilling any round stock up to 3 inches in diameter Adjustable depth stop and spring action control of the head