Towing Chain G80,blue coated, Clevis Slip Hook Both Ends. Towing Chain G80,Color-black, Clevis Slip Hook Both Ends.Size W.L.L mm inch T 8 (5/16) 2 10 (3/8) 3.2 13 (1/2) 5.4 These are the only chains recommended for use in over-head lifting. Do Not Exceed Working Load Limit(W.L.L)