As torque wrench (10) including a handle grip (11) and at least one head (12) that holds a clamping tool (13, 14) in the form of a rotary socket (16) located at one extremity of a handle grip (11) on of the torque wrench (10). The rotary socket (16) is housed in an annular element (17) integral with the head and comprises a central opening (18) defined by a hexagonal wall with facets (19). The torque wrench (10) further includes a spring element corresponding to the head (12) which comprises a at least one blade spring (22). In the constrained position, the free end of the blade spring (22) is blocked against a side (29) of a tooth (21) and blocks the rotary socket (16). This socket can be released after the blade spring (22) buckles and slides along the side of the tooth (21).
