I have an older Kryptonite lock that has a more commercial cylinder lock in it,the kind found on soda machines. It also keys from the side not from the bottom like the new ones have. I tried to use many pens on them and could not even find one that even fit over the cylinder. All I can think is that Kyrptonite over the years went to a cheaper lock manufactuer. These locks have been used for many years with very good results,if not you would not find them on outdoor vending machine. Is this another example of a company going overseas to by a cheaper component for the product I do not know,but it sure looks like it. I did read on another link that they are going to change out either the whole lock or just the locking bar. I still think it is the best lock out there. I'm just glad I bought mine 7 years ago