I will send you two items: a U-lock and a bracket for attaching the U-lock to a bicycle frame for transport. (1) U-lock (SAIKO LX-7) * Includes two keys. * Internal dimensions of the U-shaped part: 20cm x 10.5cm * Used with a cross bike and a 400cc motorcycle. (2) Bracket for attaching the U-lock to a bicycle frame for transport * Can be adjusted to L-shape or I-shape to fit the mounting location. * The bolts have some rust, but are not seized. I have confirmed that they can be loosened. * The bracket's inner diameter is 31.8mm, compatible with the size of a typical seat tube. Fine adjustments are possible with spacers and bolt tightness. I used it on my cross bike's seat tube without a spacer. #1221