Premium Home Improvement Tools: Perfect for straight or angled drilling; drilling on the edge of a board or on round stock Sturdy Woodworking Tools: Attaches to all 3/8" & 1/2" cordless drills; it also includes a 3/8" capacity chuck with key Multiple Angle Settings: Angle readout for setting drilling angles to 45°, 60°, 75°, and 90° Versatile Carpentry Tools: Centering channels built into the bottom of the base, to accommodate drilling any round stock up to 3 inches in diameter Premium Milescraft Tools: We offer products that help woodworkers and do-it-yourselfers to complete projects quickly, accurately, and easily.