My Basenjis agree that leather is much nicer!! They eat them asap.!! So far the metal parts have escaped! Any one would think I don't feed them!!
However I think that there is nothing nicer than a good leather lead, I keep mine for best or when I don't have too many dog out together so that I can't watch them all at the same time. I use a 2cm for walking and a 1cm for showing.