GEM LOCKS – NON MASTERED LOCKSCustomers that are security conscious the GEM locks – non mastered locks are ideal. Consequently customers can purchase these locks as they are not able to be reproduced as they have no master key.Furthermore GEM locks come with two non mastered keys.Customers seeking a key lock to key their letterbox the same as their house key have the option of purchasing the Carbine LBX C4 lock
