Originally Posted by GS
I have a dozen of various ones in my bag that I found on the courts over the years.
My favorite was an old Dunlop one---it was a black, square-ish thing that folded in half after you installed it around the bottom string, then was held by a clasp. It never came off, but the little top hinge fell apart over time.
So I tried the 3 cent #64 rubber band, and never looked back.
those old Dunlops were Great !