Kinedyne rope tie off – 6″ x 2″ d-ring spring-loaded fitting – 660001 heavy duty rope tie off with d-ring end is an easy way to add versatility to your e-track system. Simply insert into the e-track and it allows use of rope, ratchet straps or other tie downs that don’t have a spring e-fitting hardware end. 4900g webbing and 1027 d-ring fitting: fe8306-1 spring fitting working load limit: 1,000 lbs./455 kgs. weight: 0.4 lbs., 0.2 kgs