This is a TSA lock, essential for international travel. It's a dial type, so you don't have to worry about losing a key. Instructions on how to set the number are included in the package. ※There is a keyhole on the bottom of the main unit, but this is for airport security personnel to open with a special master key. Please note that a key is not included with the product. ※The initial number is set to "000". Please set your own number, and if you forget it, try "000" to "999". (This product is new and unused) Size: Approximately 61mm (H) x 29mm (W) x 14mm (D) Weight: Approximately 64g Material: Steel, Zinc This product will be packaged with cushioning material to protect it from impact during shipping.