Tightening aid for defined contact pressure. The tightening aid can be used with the help of the EVO series. Soft clamp inserts provide additional protection for the bundled goods. In addition to the Ratchet P-Clamp cable clamps, various accessories are available. The tightening aid enables a defined contact pressure using a hand tool from the EVO series and ensures a high level of process reliability. For sensitive bundled goods, special inserts made of soft material are available for each clamp size. The inserts also provide additional protection in applications with strong vibrations.