Abstract: The hand tool (1) has a body (7), and a chuck (4) with an axial opening (3) on an axis of the tool. A tool element (2) is movable between a retracted position generally within the body, and an extended operative position wherein the tool element extends through the axial opening and chuck, the chuck having a stop (15) for blocking further extension of the tool element once in its operative position. A movable means (16) blocks the tool element against retraction when in the operative position, the movable means being dislodgeable when retraction is desired, to a position where the movable means no longer blocks the tool element against retraction. In the preferred embodiment, the hand tool has multiple tool elements (six for example), spaced around the axis of the tool. Each tool element, when extended, has a proximal end which abuts the distal end (14) of an axial post in the handle of the tool.

Abstract: The hand tool (1) has a body (7), and a chuck (4) with an axial opening (3) on an axis of the tool. A tool element (2) is movable between a retracted position generally within the body, and an extended operative position wherein the tool element extends through the axial opening and chuck, the chuck having a stop (15) for blocking further extension of the tool element once in its operative position. A movable means (16) blocks the tool element against retraction when in the operative position, the movable means being dislodgeable when retraction is desired, to a position where the movable means no longer blocks the tool element against retraction. In the preferred embodiment, the hand tool has multiple tool elements (six for example), spaced around the axis of the tool. Each tool element, when extended, has a proximal end which abuts the distal end (14) of an axial post in the handle of the tool.

Abstract: The roof shingle is made of plastic and has a generally planar nailing portion and a generally planar exposable portion extending generally coplanarly from the nailing portion. An imaginary first axis defines the nailing portion from the exposable portion. The shingle has a fold area extending generally centrally through the nailing portion and the exposable portion along a second axis generally at a right angle to the first axis. For the ridge line of the roof, the shingle may be folded along the fold area to produce a V-shape for installation along the ridge line, without having to cut the shingle or use a different design.