Patent ID: 7165480

Claim:
A hand tool having a positioning and locking joint, comprising: a head provided at an end thereof with an arcuate face, on the arcuate face being formed with a plurality of teeth; a handle, connected to the head in a manner allowing rotating movement in relation to the head, the handle being formed with a first receiving hole, a second receiving hole and a third receiving hole communicating with the second receiving hole; and a positioning and locking joint, including: a first stop mechanism received in the first receiving hole, the first stop mechanism having an end constantly urging against one of the teeth formed on the head; a second stop mechanism received in the second receiving hole, the second stop mechanism having an end selectively engaging with one of the teeth formed on the head; and an operative pin received in the third receiving hole for controlling the second stop mechanism to engage with or disengage from one of the teeth formed on the head, wherein the first stop mechanism includes a first resilient member; and a ball, located at an open end of the first receiving hole and resiliently urged by the first resilient member so as to resiliently urge against one of the teeth formed on the head.