My mac 21 has 1/8th all the way around.... and i can go to the book and get the breaking strength and SWL, but I dont know the designation of stainless stay/shroud wire.... i have a lifetime of experience in the heavy lift crane and rigging industry but never worked with this type of wire or anything smaller than 1/4.... but on the off chance that you need to know anything about cranes and heavy lift rigging and shackles up to about 3" stuff, I can help you out...