The S-5-KHD is the most heavy-duty and durable clamp in the family. Designed primarily for new construction, this clamp fits the very distinctive profiles of the Lysaght Klip-Lok 406, McElroy Mirage, Metal Sales Clip-Loc and AEP Span Klip-Rib. This clamp features an insert that is placed on the intermediate seam for extra hold.