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The other day a customer came in to have some keys duplicated. They looked like office furniture / file cabinet type. AP1, AP2, and AP3.
Maybe Steelcase/Chicago? But I noticed there is a small dimple on the side of the blank. The blanks at the shop do not have this feature?
So, I am hoping some one can inform me as to what this feature is and if it's needed or who is using them?
Thanks

Jet blanks K101H - K104H have this dimple.

Thank you, it's good to know I can order them with the dimple. The dimple is so far back on the blank, at the shoulder stop, I really don't see how it can be doing much? Although, I haven't seen or taken apart the lock it goes into.?