Dangerous Threads Scrapbook Binding Screws - Screw Post Extenders - Various Colors & Sizes (25 pieces, Nickel - 3/8") Size 3/8" - Screw Head: 1/16" (See Pic: A top & bottom head will add an additional 1/8" to post length) 25 Pieces: 25 Tops & 25 Screws Steel with Nickel (Silver) Finish Screw Posts / Binding Screws are great for a post bound photo album or scrapbooks!