Our Chicago Posts are machined using solid brass. They feature a smooth low profile dome shaped head with hole through / open back. Our low profile head thickness offers minimal interference. The angle on our heads ensures that if there is ever contact with something, that it will easily slide over it and not get caught. The hole through the head allows for more thread engagement of the mating screw. You will approximately get an additional 2 turns assuming the mating screw is longer than the shank of the hole through post being used. They are available in various finishes. Sold singly. Use in conjunction with our Chicago Screws for a complete binding solution. The applications are endless. For high volume pricing or any questions, please contact us. Size on product title refers to shank length. For more details on our products, how to measure and other helpful resources please visit our Product Guides. Please click on each item for detailed dimensions. Price breaks available at 10+, 50+, 100+, 500+ & More. Click item to see pricing.