Abstract: A method and apparatus is disclosed for drilling holes, each having a substantially similar and desired depth. Apparatus 10 includes a limit switch 42 which deactivates motors 20 and 33 and light 34 when the drill motor's travel has reached a predetermined point and correspondingly the drill bit has reached a desired depth.

Abstract: The present invention discloses a torque restraining device to resist the lateral shifting or rotation of a self adhering drill unit due to the torque generated by the drill motor. The torque restraining device includes a penetrating member mounted on the bottom of the drill unit for penetrating the work surface to prevent rotation of the drill unit during use. The penetrating member is embedded by the action of the drill unit being pulled to the work surface when the mounting base of the drill unit is activated. In the preferred embodiments, a protective sleeve is reciprocally mounted about the penetrating member to encase the penetrating member to prevent damage when the base is not activated. Upon activating the base, the sleeve retracts to expose the penetrating member for penetration into the work surface.