An overrun brake initiates when the towing vehicle brakes, but also when the trailer draws close to the towing vehicle (e.g. when descending). In combination with a brake lines and wheel brake, this mechanism should be frequently checked and adjusted. Many different kinds of overrun brakes are available. Protempo supplies KNOTT overrun brakes with so-called triangular plate; type KF. KFL, KFG and KFGL, but also height-adjustable overrun brakes such as type KHA and KHD as well as overrun brakes that are slid across a rectangular drawbar; type KRV and overrun brakes with a round or square drawbar.