Pair of 3 Inch Brown Rubber Coated Brass Swivel Snap (2, Brown)

5 8 Inch Swivel Hook

assorted sizes Solid Brass Swivel Spring Snap Hooks Keychain lobster claw clasp with D ring pet horse leash leather DIY links - AliExpress

This is a heavy-duty snap that has been coated with rubber to prevent damage to pole. You will need to purchase 2 for each flag. These are sold as

Rubber Coated Brass Swivel Snap - 3 Pair

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1 Pair 3 Inch White Rubber Coated Brass Swivel Snap 2

Eagle Claw Fishing Tackle Gold Barrel Swivel with Safety Snap 01041 – Good's Store Online

3 Inch White Rubber Coated Brass Swivel Snap (1, White)

Brass Snap Hook with rubber coating -3 1/2 Inch – American Flagpole & Flag Co.

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Brass Snap Hook with rubber coating -3 1/2 Inch – American Flagpole & Flag Co.