These units are developed to ensure that every brake of a given model designation will be matched at a pre-determined torque and current point to every other brake of the same model designation. By possibility of a special adjustment each brake will be matched at the selected match point to within ±1.5% provided that the match point is above 50 % of the max possible torque.

All other points of the curve then are within ±4% deviation from each other. The use of matched hysteresis brakes is, for example, an advantage in a multi tension control system for multi spool payoff frames.