Manual wrench for actuating cylindrical elements

A set of manual wrenches for actuating cylindrical elements, the set comprising:

• a plurality of wrenches, each of the wrenches having,
• an actuating handle;
• a fixed jaw arranged on one end of the actuating handle;
• a moving jaw articulated and rotatably mounted about an axis on the one end of the handle;
• a spring fixed to the handle and actuating said moving jaw towards a closed position on the fixed jaw;
• a toothed section on the fixed jaw;
• the toothed section having teeth, each tooth thereof having a crest and the crests of the teeth determine an arc having a radius;
• a center of the arc of the toothed section is located at a distance from a center of the axis of rotation of the moving jaw, wherein each of the wrenches, of the set of wrenches, has a different radius for the arc and each of the wrenches of the set of wrenches has a different distance;
• and
• the radius of each of the wrenches is between 35 millimeters and 15 millimeters, and the distance is between 20 millimeters and 57 millimeters,
• wherein for the plurality of wrenches in the set of wrenches, the radius of one wrench in the set is larger than the radius of a next wrench in the set and the distance of the one wrench in the set is smaller than the distance of the next wrench in the set.