Patent ID: 6848343

Claim:
An adjustable wrench, which can turn fasteners with different sizes, wherein when the wrench is turned in a direction, the fastener is turned and when the wrench is turned in opposite direction, the fastener is kept still, comprising: a handle having a head portion at an end thereof, a guiding slot in said head portion, two rails at opposite sides of a top of said guiding slot, an opening communicated with said guiding slot and a fixed jaw at ends of said rails; a movable jaw having an end thereof slidably received in said guiding slot of said handle; an adjusting worm received in said opening and pivoted on said handle for driving said movable jaw to move; said fixed jaw having a holding surface facing said movable jaw, wherein said holding surface has a driving face and a base face with an end thereof connecting said rails and the other end thereof connecting said driving face, wherein said base face is to rest against a first side of the fastener and said driving face is to rest against a second side of the fastener which is a side next to said first side; said movable jaw having a holding surface facing said fixed jaw, wherein said holding surface has a driving face to rest against a third side of the fastener which is a side opposite from said second side; an elastic supporting device having an end thereof provided on said holding surface of said movable jaw to be elastically movable against the fastener; and an included angle between said base face of said fixed jaw and said rails is in a range of 123 degrees to 134 degrees.