Features: Made of stainless steel and aluminum profile and steel, with aluminum base and stainless steel ring, single stud fitting will not rust and prevent corrosion. The rated- capacity is 3500 pounds, and the maximum can reach 4000pounds, which is the maximum load weight that the lashing device should bear; This accessory is suitable for most aluminum rails. Round ring for variety of tie down end fittings. Works with a wide variety of hooks, snaps, and straps. The fitting is spring loaded- to permit simple attach and detach operation. Specifications: Material:Stainless Steel Quantity:1pc,6pcs,10pcs(optional) Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x or 6x or 10x Single Stud Fitting L-Track