Nite Ize CamJam XT Aluminum Rope Tightener, Large Versatile Tie Down Cam Mechanism With Carabiner Clip + 500 LB Load Limit KNOT-FREE ROPE TIGHTENER - Tighten, tension, connect and secure heavy loads with knot-free technology, by simply pulling your rope or cord through the cam mechanism of a Nite Ize CamJam XT Aluminum Rope and Cord Tightener TWO WAYS TO USE - Featuring a carabiner clip and gate on one end, the CamJam XT is cleverly designed to be configured in either a Fixed End or a Loop System to securely tie down lumber, gear and other heavy loads RUGGED CONSTRUCTION - Made of heavy-duty, durable cast aluminum, the CamJam XT has a single pack load limit of 500 lbs (227kg) and a break strength of 1500 lbs (680kg). Fits rope sizes up to 3/8" (3mm-9mm) QUICK TO RELEASE - When you are done using the CamJam XT rope tightener, simply rotate the cam lock lever and pull your rope or cord upward WARNING - Not for use where disengagement could result in bodily injury or property damage. Not for climbing. MADE BY NITE IZE - We have been creating innovative, solution-based products with quality, performance and value for over 25 years