Adjustable wrench

1. An adjustable wrench, comprising a fixed jaw base, an adjustable jaw base and a handle, the fixed jaw base comprising an end surface at a front end thereof, a pivot portion at a rear end thereof, a curved first operation portion between one side of the end surface and the pivot portion, a first jaw extending forward from another side of the end surface, a slide groove formed in the front end of the fixed jaw base and parallel to the end surface, a pin hole extending through the fixed jaw base and perpendicular to the slide groove, a pivot through hole at the pivot portion and a trough in the pivot portion to communicate with the slide groove; the adjustable jaw base comprising a slide rod which corresponds in shape to the slide groove of the fixed jaw base and is slidably movable in the slide groove, the slide rod having an elongated spring room and a poke recess at one side of the spring room, a spring being provided in the spring room, one end of the spring being fixed to a pin member inserted in the pin hole, another end of the spring being in the spring room and pushing the slide rod to move towards the first jaw, the slide rod having a second jaw extending forward from a front end thereof and corresponding in position to the first jaw, the second jaw being against the end surface and moved along with movement of the slide rod in the slide groove to adjust a space defined between the first and second jaws, the space being adapted to clip an object; the handle having a connection portion at one end thereof, the connection portion being inserted into the trough of the pivot portion of the fixed jaw base, the connection portion having a connection hole and a poke rod corresponding to the poke recess of the slide rod of the adjustable jaw base, an axle pin being inserted through the pivot hole and the connection hole to connect the pivot portion and the connection portion, the poke rod being inserted in the poke recess of the slide rod;

wherein the poke recess is a U-shaped recess, and has a width slightly greater than a width of the poke rod and a depth slightly greater than a length of the poke rod; and wherein the poke rod extends into the U-shaped poke recess of the slide rod, the slide rod having a stepped notch next to the poke recess, the poke rod having a protrusion corresponding to the notch.

2. The adjustable wrench as claimed in claim 1 , wherein the fixed jaw base further has a protruding second operation which is disposed between the first jaw and the pivot portion and corresponds to the first operation portion.

3. The adjustable wrench as claimed in claim 1 , wherein a limit pin is provided inside the spring room of the slide rod of the adjustable jaw base.

4. The adjustable wrench as claimed in claim 1 , wherein the first and second jaws of the fixed jaw base and the adjustable jaw base have curved anti-slip surfaces which face the space and have snap threads thereon.

5. The adjustable wrench as claimed in claim 1 , wherein the first and second jaws of the fixed jaw base and the adjustable jaw base have flat surfaces which face the space and are perpendicular to the end surface.

6. The adjustable wrench as claimed in claim 5 , wherein the first and second jaws of the fixed jaw base and the adjustable jaw base have bent surfaces located next to inner ends of the flat surfaces and corresponding in shape to an angled portion of a hexagonal screw or nut.