Abstract: A portable electric drill is disclosed which includes a loss-proof chuck key. The drill includes a cord set and the chuck key includes a simple, rod-like handle which is shaped to form a closed loop. The loop is slightly larger than the diameter of the cord set but sufficiently smaller than the cross sectional dimensions of the plug so that the key cannot be slipped off over the plug. In a preferred embodiment, the key comprises a triangular handle to provide a good gripping surface for the user. Other accessory hand tools for use with electric or pneumatic power tools attached to the power tool in a similar manner are also disclosed.