Master Lock 1-7/16 in. H x 13/16 in. W x 2 in. L Steel Ball Bearing Locking Padlock 1 pk Keyed Alike - Walmart.com
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LockPickingLawyer on Twitter: "I vaguely remember reading that the American Series 10 was the first production lock with a ball bearing locking mechanism… but I can't find a citation. Can anyone out