IronSmith wrote:If you were looking specifically at opening the 2500, what tools what your reach for? What experiences, suggestions, tips, trick etc. would you bring to the table?
Hi.
Just so everone else knows we're talking about, as Raimundo said, a hockeypuck style padlock, but one with a keyhole on the flat face of the lock, not on the perimeter as this style of lock usually has.

I have to say that when a user comes along asking how to open a specific model of lock, my ears perk up, because for a hobby lockpicking site we like to open all sorts of locks, not just 1 exact model. Your client might be in the vending or lockout business where he gets called to unlock 10 of these per day as part of his job, but to me anyone asking for a specific model and instructions on how to open it (and many of such model) has a target in mind that uses that specific lock.
This lock uses the same cylinder and pins as all the other American Lock padlocks. 10 serrated pins, and an unusually wide open bottom of the keyway, which is difficult to tension unless you have a thick tension wrench. Normal tension wrenches just 'cam out' Peterson or Lockmasters may have a bypass tool for this series, but since these locks commonly protect contractor vans who have lots of nice tools inside, or protect soda and snack machines, I'm not overly comfortable giving away any tips and tricks.
If this client is a lock out expert or locksmith or the owner of the vending company, then he should keep spare keys at the office, or if thats not possible, he should practice picking to get good at it, or carry around a cordless drill to drill out the cylinder as needed.
good luck,
Squelchtone