The intelligent principle of "lasso" the combined chain in U afford to secure the frame and both wheels of my bike with only 1.20m chain (without this principle lasso would have had to do what 2m) Be careful as any solid lock, it is heavy, it is referenced as dailleurs motorcycle theft / scouter As a cyclist (paranoid) so it stays in place in the garage of my bike workplaces or sometimes spends the night safely