The Tite-Lok TL-1 Truck Cap Clamp is a high-quality hardware component designed for mounting truck caps or covers. It is made of durable materials such as fiberglass and aluminum, ensuring long-lasting use. This clamp features A= 0 to 2” Clamping Range B= 1-7/8” Major Reach C= 1-1/8” Minor Reach Base D= 1-3/4”