Abstract: The structure in its preferred embodiment involves a preset control device for measuring instruments such as but not limited to torque release wrenches of the preset type wherein an elongated casing and handle confines a work engaging member, an elongated load translating member extends therefrom, and adjustible measuring instrumentalities are intergeared therewith to preset the turning load of release. The measuring instrumentalities are dominated by a simple and compact control unit disposed transversely of the elongated casing and handle member to provide a calibrated dial positoned to rotate in the path of a viewing opening in the casing for manual presetting to a selected load.