The ARMOR TOOL In-Line Clamp has several unique advantages that will make your job much easier and more efficient. It features automatic adjustment, allowing it to easily and securely clamp into any standard 5/16" T-rail. With a hardened steel adjustment rod, this clamp provides consistent pressure, even on materials up to 3.75" thick. You can easily adjust the pressure with the built-in adjustment screw, ensuring your product is held as comfortably and securely as possible. With the T-bolt rotating around its axis, you can quickly install the clamp anywhere there is a standard T-guide. The large handle provides maximum grip and comfort, while the hardened plastic tip with non-marking material lining securely clamps corners and rounded materials. With sturdy construction and a high load capacity of up to 700 pounds, this clamp will be a reliable helper in your workshop.