1" Aluminum Screw posts are anodized with an Antique Brass color. These posts are a wonderful way to do any binding project quick and easy. The post is 1" in length with a 3/16" diameter. The screw post and screw has a head size of 7/16" diameter and is 1/16" thick. If you want to proper fit for these posts you should measure your document first. should be drilled or punched for a standard 1/4" hole. These posts are the industry standard size. They are compatible with all standard posts, including those sold under the Charles Leonard brand. These screw posts can be extended using our 1/2", 3/4", and 1" screw post extensions. 1/4" screw post extensions may also be used with the addition of 3/16" screws (the 3/8" screws furnished with these screw posts are too long to work properly with 1/4" screw post extensions.)