wolfcraft 4525404 Muilt-Angle Drill Guide Attachment with Chuck for 1/4" and 3/8" Drills Drill Guide that can be used in horizontal, vertical or angle positions Guide-bars themselves have springs for a quick return when doing repetitive drilling Drill adapter itself slides up and down on guide-bars Angle positions can go up to 45 degrees, and rubber pads in the base hold the guide in place Fits all 1/4-inch or 3/8-inch drills