Abstract: An attachment for motor powered drills for accurately positioning drill bits when holes of regulable depth and angle are to be drilled in a work piece. An open-centered base for contact with the work piece provides journal supports for paired rotatable trunnions that may reciprocally receive guide rods disposed above the base and at right angles to said trunnions. Paired guide sleeves of a frame attached to the drill motor and disposed parallel to the axis of the drill reciprocally receive the guide rods, and the drill and its bit are, accordingly, movable along the guide rods to cut a desired hole in the work piece. Index means and detents facilitate varied angular positionings for said trunnions and guide rods whereby holes that are angularly disposed with respect to the work piece may be drilled. The guide rods may be extended through the base to provide accurate centering of drilled holes, and a separate jig or vise is provided that holds the drill attachment and drill, etc. in adjusted lateral positions.