Patent ID: 7197966

Claim:
A hand tool comprising: a head having an insertion portion and a plurality of first teeth defined in an outer periphery of the insertion portion; a handle having two lugs and a recess defined between the two lugs, a first biasing device connected to an inner end of the recess, the insertion portion of the head being pivotably received in the recess by a pin; a control member located between the insertion portion and the inner end of the recess, the control member having a plurality of second teeth defined in a top thereof and the first teeth engaged with the second teeth, a cam-like protrusion projecting from an underside of the control member and including a first slope outer surface and a second slope outer surface which is in contact with the first biasing device, the control member including two side plates which are located on two outsides of one of the two lugs, and a second biasing device connected to the lug on which the two side plates are mounted, the second biasing device projecting from one of the two outsides of the lug and a side of one of the two side plates moved over and stopped by the second biasing device when the control member is pivoted.