The Mega S4 is preferably used in combination with the 22mm toothed belt when an easy operation is required. The lever ratio enables a high force to be attained, which is necessary to tension and hold heavy objects. The strain on the toothed belt is completely released by pressing the lever right down.
The Mini N is used in combination with the 18mm toothed belt. This type is built the same way as the Mega S or K, but is a lighter model made of plastic. The available force is somewhat lower.
The Mega K4 or C2, used in combination with the 22mm toothed belt, is a module of similar build to the S4. The attainable force is the same as for the S4 but this system differs through a flatter design. The strain on the toothed belt is also released completely by pressing the lever right down. The flat design of the lever prevents unintentional opening. The lever of the model C2 is provided with an additional safeguard which makes an unintentional opening of the lever difficult.