Product Features: Galvanized steel cable, vinyl coated. Product Features: Similar to the PA410U, but serialized (has serial numbers on it) with a preset 4-digit combination and sold in multiples of 25 Features: 6.5 foot galvanized steel, vinyl-coated cord. Lock Slot - The lock secures to your laptop using the rectangular lock slot (standard on all laptops); preventing theft and acting as a great deterrent. Security Lock – The security mechanism is locked and unlocked using a preset combination. Security: Kevlar-reinforced cable offers increased resistance to the most determined thief.