This is an excellent tie-down. While it is strong and dependable, what makes it particularly useful is its 18' length, which is easy to loop around a large load or an odd-shaped item. The 1" wide belt is heavy woven nylon (similar to seat-belt material) with a 2100 lb (about 950kg) breaking strength and a safe working load rating of 700 lb (about 320kg).
The low-profile buckle is made of zinc alloy and stainless steel to resist corrosion and has a toothed clamping jaw to automatically lock tension on the strap.
It's also simple to operate – just feed the strap through the buckle and pull to cinch tight. To loosen the tension, press the thumb-operated release.