The CamJam XT is a heavy-duty tool designed to tighten, tension, and securely lock serious loads up to 280 lbs. Its carabiner clip and gate on one end and rotating cam mechanism on the other allows you to anchor the carabiner and feed the cord through the cam until you've reached the desired level of tension. Or, create a loop by clipping the Cam Jam XT to one end of the cord and pulling the other end through the cam. This loop enables you to bundle or wrap heavy loads and easily secure them. Pull the cord firmly and the cam locks into place and stays that way until you release it by rotating the cam and pulling up on the cord. Easy to adjust and re-adjust the CamJam XT is engineered for superior durability and strength, and can be used and reused. Excellent for securely tying down lumber, gear, and other heavy loads to roof racks, bike racks, and truck beds. It's also designed to hold the cord without tension in a slack configuration allowing for greater versatility of use.