I bought the chain together with the frame lock 4850 LH NKR TwinSet. This chain is like the dot on the I. It supplements the frame lock excellent. The wheel can be so chained to fixed objects or other bicycles. The meter is sufficient fully as you can pull the ring on the chain and thus exploit the full meter. Positive to mention is still the chain guard makes the chain unobtrusive and protects against a abschäuern the border color. I would buy the chain immediately.