They fit around the head of small padlocks keys, suitcase keys, file cabinet keys and any other small keys. The maximum size key they will fit is the standard Master padlock M1 key blank, which is just slightly larger than a penny.
Architectural Mailboxes #5141 Key Blank for Mailbox Lock with Indicator is used for additional key duplicates. Existing key required to duplicate the key blank.
Architectural Mailboxes 5141 Key Blank for Mailbox Lock with Indicator
Mailbox Keychain
Key Ring Identifiers
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They fit around the head of small padlocks keys, suitcase keys, file cabinet keys and any other small keys. The maximum size key they will fit is the
LOT OF TEN SMALL KEY RING IDENTIFIERS FOR PADLOCKS MAILBOXES IDENTIFIERS
spare key for mail box. DIY Home Improvement Forum
ABUS 74/40 Padlock 7440BLKKD Black Nylon Protected Safety Lockout Aluminium KD
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Fingerprint Padlock, Smart Padlock with USB Charging Support, Fingerprint Lock, Biometric Lock Suitable for Luggage, Bookcase, Suitcase, Backpack, Bike, School Locker, Gym Locker Lock(Gray)
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Yale Padlock Key
KEYED ALIKE 2 LONG SHACKLE LOCKS – Have mercy on your keyring! Don't walk around with a separate key for every padlock you maintain, these keyed
Lion Locks 12 Keyed-Alike Padlocks w/ 2” Long Shackle, 24 Keys, Hardened Steel Case, Pick Resistant Brass Pin Cylinder (12-Pack) for Hasp Latch, Shed