best body clips

[blueb8llz]

are those dubro body klips those wires i see in people's rc bodies where they have this colored string going from one clip to another?
is this for when a clip pops out, it wont be lost because its still connected to the other clip?
they sell locking body clips, how are those? they cost $2 for 4 or i can get 12 normal clips for $2. i wonder which will save in the long run.