The heavy duty etrack O-Rings are compact and portable, compatible with all E Track/X Track trailer tie-down rails or E port single slots. These heavy duty O rings work seamlessly to anchor any ratchet straps, chains, cam buckle straps, vehicle tie downs, motorcycle tie downs, trap straps, bungee cords, rope, kayak tie down straps and more. Each slot has a breaking strength of 6,000 pounds and a safe working load limit of 2,000 pounds. Reinforced steel interior make these super heavy duty so you can tie down even heavier cargo with peace of mind. Safely secure anything when you tie down your furniture, motorcycles, landscape equipment, cargo, machinery, oil drums, vehicles, appliances and musical instruments with these heavy duty steel O ring tie down anchors.