E TRACK Triangle-Ring Spring Fitting - 8 Pack This listing is for EIGHT (8) tie down attachments. Each fitting has a 3,500 lb.* vertical pull weight rating. Purchased individually @ $3.95 each the cost would be $31.60 - therefore you SAVE $6.65. The fitting is compatible with all e track (horizontal & vertical) and e track plate. User friendly spring actuated release lever. *RATED CAPACITY: Also known as "assembly capacity" or "break strength" is the minimum load a complete assembly can withstand before failure in a laboratory pull test when the product is NEW. WORKING LOAD LIMIT: The maximum load weight a tie-down should be subjected to during normal use. To assist in making the proper tie-down choice the Federal D.O.T. requires the W.L.L. to be 1/3 of the Rated Capacity.