Keeper 790 combination anti-theft chain lock

Updated 2026-09-05

Featuring 7 mm four-sided chain links made from hardened manganese steel, this three-foot lock offers a solid defense for bicycles. The chain is encased in a protective fabric sleeve that prevents scratches on the bike frame. Its length is ideal for securing a single bike to a standard rack or pole in moderate-risk areas.

This model utilizes a four-digit resettable combination system, allowing users to set their own personalized code for keyless convenience. The lock head is integrated directly into the chain, removing the vulnerability of a separate shackle. The combination dials are designed for easy visibility and smooth operation, even when wearing gloves during colder weather.

The lightweight design makes it easy to transport by wrapping it around the seat post or carrying it in a bag. It serves as an excellent primary lock for quick stops or a secondary lock for added security in higher-risk locations. The durable materials ensure long-lasting performance and resistance to common hand tool attacks.

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