A reciprocating wrench for quick combining fastener includes a main body, a claw, and an elastic positioning device therebetween. The main body includes a concavely-shaped first jaw opening, which has a pivot end at an end thereof. The claw includes a concavely-shaped second jaw opening, which has a pivotal combination portion at an end thereof. The pivotal combination portion is pivotally connected with the pivot end, such that the claw and the main body pivotally move with respect to each other. The elastic positioning device allows the claw to optionally rotate toward a closing direction or remain in the opening status. Therefore, the claw is able to remain in the opening status for combining the fastener.

A reciprocating wrench for quick combining fastener includes a main body, a claw, and an elastic positioning device therebetween. The main body includes a concavely-shaped first jaw opening, which has a pivot end at an end thereof. The claw includes a concavely-shaped second jaw opening, which has a pivotal combination portion at an end thereof. The pivotal combination portion is pivotally connected with the pivot end, such that the claw and the main body pivotally move with respect to each other. The elastic positioning device allows the claw to optionally rotate toward a closing direction or remain in the opening status. Therefore, the claw is able to remain in the opening status for combining the fastener.

A reciprocating wrench for quick combining fastener includes a main body, a claw, and an elastic positioning device therebetween. The main body includes a concavely-shaped first jaw opening, which has a pivot end at an end thereof. The claw includes a concavely-shaped second jaw opening, which has a pivotal combination portion at an end thereof. The pivotal combination portion is pivotally connected with the pivot end, such that the claw and the main body pivotally move with respect to each other. The elastic positioning device allows the claw to optionally rotate toward a closing direction or remain in the opening status. Therefore, the claw is able to remain in the opening status for combining the fastener.

A reciprocating wrench for quick combining fastener includes a main body, a claw, and an elastic positioning device therebetween. The main body includes a concavely-shaped first jaw opening, which has a pivot end at an end thereof. The claw includes a concavely-shaped second jaw opening, which has a pivotal combination portion at an end thereof. The pivotal combination portion is pivotally connected with the pivot end, such that the claw and the main body pivotally move with respect to each other. The elastic positioning device allows the claw to optionally rotate toward a closing direction or remain in the opening status. Therefore, the claw is able to remain in the opening status for combining the fastener.

A pipe wrench structure with a secure positioning function includes a main body, an engaging portion including a pivot point, an upper jaw and a lower jaw for performing an opening/closing operation, a pipe being placed between the upper and lower jaws while clamping the pipe; an elastic restoring member, installed to the upper and lower jaws and configured to be corresponsive to the pivot point, and provided for providing a pressing force to the upper jaw; an auxiliary ratchet surface, disposed at the lower jaw; an arc ratchet surface, disposed on an inner side of the upper jaw opposite to the lower jaw, and being in form of concave arc surface without an included angle, and the curvature of the arc ratchet surface being greater than the external periphery of the pipe.

Various embodiments of a hand tool shown a wrench are provided. The wrench includes an adjustable head that allows for use within small spaces such as around plumbing fixtures. Various embodiments include a head with a fixed jaw and a moveable jaw such that a position of the moveable jaw relative to the fixed jaw is adjustable when the adjustment mechanism is actuated. In a specific embodiment, the adjustment mechanism allows a user to change the position of the head with one hand and/or a thumb.

Various embodiments of a hand tool shown a wrench are provided. The wrench includes an adjustable head that allows for use within small spaces such as around plumbing fixtures. Various embodiments include a head with a fixed jaw and a moveable jaw such that a position of the moveable jaw relative to the fixed jaw is adjustable when the adjustment mechanism is actuated. In a specific embodiment, the adjustment mechanism allows a user to change the position of the head with one hand and/or a thumb.