Never been used I have Loads of these in other sizes and types in my ebay shop. 

 Anchors, Rigging Screws, Snap Hooks, Bilge Pumps, Wire Rope, Fairleads, Chain, U Bolts, Eyebolts, Pulleys, Lifting Blocks, Cleat Hooks, Eye Plates, Sheet Eye Straps, ETC All from stock ! in my ebay shop.  If I don't Stock it I will help you find it !