You could actually replace all the shackles on your boat with them. Those few ounces of SS are clearly keeping me out of first place
I like making things and they are easy to make and cheap.

tim... not so good with chafe really but if you keep an eye on them you would have to go through 10 or so softies to equal the price of one shackle (yes, only 12 bucks or so. I figure the hassle isn't worth it for any significant possibility of chafe.)

off the top of my head... could replace the shackle at the outhaul for the main, could make good quick tie offs for the spin bridles, jib halyard shackle, dowhaul shackle (if you use one to connect the downhaul line to the eye on the mast), even the shackles holding your mainsheet blocks to the traveler and to the clew of the main if you don't already use a quick release shackle.