Guide attachment for portable power drills

In a universal drill guide assembly for use with hand-held power drills, comprising, in combination,

• a base having a pair of parallel laterally spaced guide rods projecting from one surface thereof,
• a drill support assembly adapted to be releasably mounted on a drill housing, such drill support assembly being moveably mounted on the guide rods to support the drill for movement toward and away from the base,
• spring means normally urging the drill support assembly away from the base,
• the base including a plate member having a central opening therethrough through which the bit of a drill may pass when the drill guide is mounted on a drill, the plate member having a flat surface on the side opposite the guide rods and extending perpendicular to the axis of the guide rods, a plurality of bores formed in the base from the flat surface, the bores being disposed in a predetermined pattern relative to the opening and to the axis of the guide rods,
• and a plurality of feet mounted one in each of at least selected ones of the bores and projecting outwardly from the flat surface, each of the feet including mounting means adapted to be releasably retained in one of the bores and a generally cylindrical body portion projecting outwardly from the flat surface, the body portions being of substantially equal length and diameter, whereby the feet may be arranged in predetermined patterns on the flat surface to adapt the guide for different drilling operations.