No Sign or Sign Holder goes unseen when you utilize proper mounting! Make the smart business choice and choose these "O" Clamps For 3/8" Thread and Stem. They are perfectly constructed to fit a 1¼" Round Hangrail to display any sign holder that attaches to the already placed hangrail. This “O” Clamp is the ideal way to display all of your important signs and sign holders. In stock and available for immediate shipment to your door!Sold in cases of 10 "O" Clamp Only, Chrome Finish, Combine With Sign and Stem, Requires 3/8" Fixture, Fits 1¼" Round Hangrail, 85-20122