I've removed the packaging, but I've never used it. Panasonic U-shaped lock, silicone cover, W-dimple key, bicycle, black, inner diameter 76 x 128mm, SAJ080B A U-shaped lock covered with a silicone cover to prevent scratches on the bicycle frame. The use of a double-dimple key is also effective in preventing mischief. Three keys are included, providing peace of mind for spares or sharing with family.