The stainless steel attachment mechanism makes this one of the strongest laptop cable locks on the market. KEYS SOLD SEPARATELY. This lock uses our Supervisor-Only Access key option and all locks are keyed-alike to be opened with the same key. For increased key control, these locks come without keys. ORDER KEYS SEPARATELY (part # CSP800896). See also our Master-Access key option to have different keys for users and a Master key for the administrator.