AIXMEET1 Pair / 5 pairs No Tie Shoe Laces for adults, Elastic Shoe laces,shoelaces tieless, no tie shoelace for kids

Are the end snap pieces not removable?? I snapped one and i cant open it. I also snapped on with laces and need to trim still!

how do the lock system work? It's just saying there not doing anything?!

Are they one size fits all? Adult and kids shoes??

Can you buy clips separately? Missing one.