Abstract: An Adjustable wrench including a main body, a slide block, a movable jaw and a grip. The main body has a jaw section and a hollow section in which the slide block and the movable jaw are disposed. The grip is pivotally connected with the hollow section. The slide block has a projecting section slidably inserted in the slide channels of the main body. A top face of the projecting section is formed with a semicircular groove. A lower portion of the movable jaw is a projecting rail complementary to the slide channels of the main body. A bottom face of the projecting rail is formed with a concave face cooperating with the semicircular groove of the slide block. The concave face is formed with a thread. The projecting rail of the movable jaw and the projecting section of the slide block are together inlaid in the slide channels of the main body.

Abstract: An adjustable wrench including a fixed jaw, a movable jaw, a gear, an engaging block, a switch button and a grip. When tightening or untightening a nut with the adjustable wrench, it is unnecessary to repeatedly draw up the wrench and fit the wrench onto the nut. The nut can be continuously rotated. In addition, the switch button can be switched to change the rotational direction without reversing the adjustable wrench so as to facilitate operation and increase working efficiency.