Abstract: A multi-function tool includes an extendible and retractable portion that becomes offset from a centerline position of the handle when in the offset position. A locking mechanism allows the workman to offset the shaft from a centerline position of the handle, or retract the shaft back into the handle into a centerline position. While the shaft is in the extended and offset position, the shaft rotates freely in either a clockwise or counterclockwise direction. When the shaft is retracted in the straight centerline position, a ratchet mechanism or gear box restricts shaft rotation in either a clockwise or counterclockwise direction, or allows rotation in either direction. The shaft can be extended and offset by means of a spring or other device that allows the locking mechanism to offset automatically or semi-automatically when the locking mechanism is activated. The shaft allows the workman to interchange bits or sockets for multiple applications.

Abstract: A hand screw driver preventing a user's wrist from being twisted during screw driving operation. The screw driver comprises an offset shank having a tip at its lower end and being bent twice such that it has a Z-shape, and a handle having a shank receiving hole for rotatably receiving an upper section of the offset shank. The offset shank is shifted between a fixed position wherein it is fixed to the handle and a rotatable position wherein it is relatively rotated with respect to the handle. A biasing member is provided in the shank receiving hole of the handle to bias the handle with respect to the shank to shift the shank between the fixed position and the rotatable position as required.

Abstract: The speed wrench includes a plastic handle and a S-curve shaped shaft with a mount to receive tool driving or drilling inserts. The S-curve shaped shaft causes the axis of the tool to intersect the axis of the handle, thereby causing a cone-shaped pattern of rotation. The shaft permits the user to rotate the handle with wrist motion, thereby rotating the tool insert.