Wolfcraft 4525404 Drill Guide Attachment for 1/4-Inch or 3/8-Inch Drills
The Wolfcraft Drill Guide can be used in horizontal, vertical or angle positions, and fits all 1/4-inch or 3/8-inch drills. The Guide-bars themselves have springs for a quick return when doing repetitive drilling, while 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 while drilling. The guide also includes spring loaded depth stops.