777..i use photobucket and pull shots from there to post.have a look at a trapper supply site.there are small "locks" of a sort that keep the wire noose from coming loose by allowing it to move in just one direction.as the animal struggles it pulls tighter.
don't worry about getting the perfect kit on the first try.as you read this site and try things out you will work out what you really need as far as size and gear.