Reversible/adjustable spanner

A reversible/adjustable spanner comprising:

• an elongate body having a handle formed on a first end thereof and a fixed jaw formed on a second end thereof, the elongate body further including an upper side, a bottom side with a plurality of first teeth formed thereon, and two lateral sides;
• a release button mounted above the body;
• a substantially U-shaped plate having two side wall sections respectively located outside the lateral sides of the body and a mediate portion located below the bottom side of the body, thereby receiving the body therethrough, the side wall sections being securely connected to the release button to move therewith along a longitudinal direction of the body;
• an adjusting member having an upper side with a plurality of second teeth for engaging with the first teeth, a bottom side, a first end, and a second end, the adjusting member being securely mounted between the side wall sections of the U-shaped member to move therewith along a longitudinal direction of the body;
• a movable jaw having a bottom side, a first end pivotally connected to one of the U-shaped member and the first end of the adjusting member, and a second operative end for holding an object to be tightened or loosened between the second operative end and the fixed jaw, wherein a longitudinal movement of the release button causes a change in a distance between the fixed jaw and the movable jaw;
• and
• a biasing means mounted between the mediate section of the U-shaped member and the adjusting member and having a first end attached to the bottom side of the adjusting member and a second end attached to the bottom side of the movable jaw, thereby biasing the movable jaw and the adjusting member upward.