Solid metal construction: made from durable metal with a stable structure that resists deformation. Built to provide reliable resistance against normal wear and impact so your bike stays protected. Compact, foldable design: special rivets allow the chain segments to fold down into a compact shape. Lightweight and convenient to carry on rides or store in a bag when not in use. Easy installation and mounting: the lock can be directly fixed to the chassis or frame with screws. Simple installation keeps the lock accessible on every ride without taking up extra space. Practical compatibility: fits most bicycles and electric bicycles. Designed for broad compatibility so it works with commuter bikes, mountain bikes, folding bikes and ebikes. Everyday performance: balances security and portability — sturdy metal links for protection, yet compact when folded for transport. Ideal for riders who need a reliable lock that's easy to carry. Use scenarios Daily commute: mount the lock to your frame and fold it up for a hassle ride; quickly unfold and secure your bike at the office or transit station. Errands and shopping: lightweight and compact to carry into stores or stash in a pannier while you lock your bike to a rack outside. Urban parking: secure your bicycle or electric bike at public racks, bike rooms or shared parking areas where a compact, strong lock is needed. Specifications and key attributes Material: metal (stable structure, resistant to deformation) Form factor: foldable chain/segment design with special rivets for lightness and compact folding Mounting: attaches directly to chassis/frame with screws for convenient onbike storage Compatibility: suitable for most bicycles and electric bicycles Why choose this lock Makes locking practical: easy mounting and compact folding increase the likelihood you'll carry and use the lock regularly. Reliable everyday protection: sturdy metal construction offers practical defense against theft attempts in common use environments. Versatile fit: works with a wide range of bicycle types without complicated adjustments.