With silver aluminum chicago screw extensions, you can quickly and simply bind documents of any kind with a more customizable length. Simply screw them into the post before adding the screw to increase your capacity. They are available in 1/4", 1/2", 3/4", or 1" lengths and in a beautiful glossy silver finish that won't scratch. Bind books of all kinds, and with any hole configuration, quickly and conveniently with aluminum screw posts and extensions. They are packaged with a pack of 100 pieces and are one of the least expensive ways to bind pages together, while still remaining professional with an executive appeal.