25.02.2007, Hamburg, Germany - A key with serial number. (key, lock, locking, block, blocking, control, controlling, safe, safety, secure, security, close, closing, danger, dangerous, metal, metallic, blur, blurred, blurry, detail, close up, closeup, close-up, symbol, symbolic, symbolical, access, open, safety key, studio shot, metal key, home key, theft, property, backup, backup key, protection, blade, key bittings, bittings, teeth, silver, numbers, digits, writing, serial number, vertical) 00W070225D024CAROE.JPG [MODEL RELEASE: NOT APPLICABLE, PROPERTY RELEASE: NOT APPLICABLE (c) caro images / Westermann, http://www.caro-images.com, [email protected] - In case of using the picture for any non-editorial purpose, please contact the agency - the picture is subject to royalty!]