What's the difference between a cable lock and a solid-shackle lock?

Cable locks use a flexible braided-steel loop that threads through awkward zipper pulls and bag handles more easily, while solid-shackle padlocks are more rigid and feel sturdier. Several of the highest-rated picks here, including the Forge and SURE LOCK cable models, use cables specifically for that flexibility. Solid or all-metal bodies, like the heavy-duty SURE LOCK, appeal to buyers who want a more rugged feel.