Kensington 64050 ComboSaver Notebook Lock and Security Cable (PC/Mac) Kensington Edge: Steel computer security cable with Kevlar brand fiber for powerful protection thats 40% stronger Small, keyless combination lock means there are no keys to carry or lose One piece design for ease of use - no little pieces to lose or misplace with this computer lock Patented T-bar lock provides most secure connection to security slot No screws, brackets or glue for installation of this computer lock - no changes to your computer