The charge is $20 per lock. When I want 2 locks be key alike, Charge $40. In fact only ONE lock need to be changed to the same as the other one. That means it is $40 for ONE change. However, I'm a bit luckier because I bought 3 locks and that meant $60 to change 2 locks, equal to = $30 per change. I love to see it is $20 per change in the future.
