In reply to stranter: Silver end clips to the gear blue to the rope, it stops the rope twisting the quickdraw from unclipping. Also you will end up with nicks, scratches and burs in the silver crab, these can damage and wear the rope. By using the same end each time you avoid the problem.
P.s i have the same draws and some more expensive ones and like these the best. Weigh nothing, really easy to clip and rack and dirt cheap, what more could you ask for.