This International Standard specifies characteristics of single-head engineer's wrenches with gaps from 7 mm to 120 mm, listed in ISO 1703 under the reference Nos. 1 1 01 01 0 and 1 1 01 01 1. The “lower torque application” designation is in accordance with the smaller head dimensions. Essentially, this International Standard establishes the first specifying maximum outside dimensions of heads and gives the test torque values, which are calculated on the basis of approximately half the values, in accordance with ISO 1711-1, series C.