• Most durable method of binding.
• Opens a full 360 degree and lays completely flat open or closed.
• Permanently binds document.
• Very durable and withstands extreme temperature.
• Available in Diameters 1/4" through 9/16" with 3:1 pitch and 32 hole on the 11" side & diameters 5/8" through 1" with 2:1 pitch and 21 hole on the 11" side.
• Available colors: black, white, blue, green, red, silver, gray and cream