Abstract: The present invention relates to a multi-functional drill and lock assembly comprising a drill cylinder, a drill pillar and a drill head. A convex tenon at the front end of the drill pillar is adapted to pierce through and sleeve with a guiding groove formed in the lock cylinder. By adjusting the position of the tenon within the guiding groove, a drill head secured to the front end of the drill pillar can be shifted so as to extend beyond or retract within the lock cylinder. The front end of the drill cylinder is formed with a screw locking hole to enable the tool to perform a dual-function. The drill head is removably secured to the drill pillar by a steel shot extending from the lock cylinder, through the drill pillar and into a shot groove formed as part of the drill head.

Abstract: An assembly including a drill bit carried by a drill shaft and a detachable main socket for use in conjunction with an electric drill to permit combination power drilling and power socket driving functions. A crank provided with a secondary socket is engageable with the drill shaft to permit manual driving of the main socket.