This punching die features 4:1 pitch, 4.75mm round holes with 0.248 spacing for plastic coil spiral bindings. Compatible with the James Burn EX380, these punching dies are made of the highest quality features and have an industry-leading design. These heavy duty, hardened steel dies offer easy access and longer, sharper life. Set up is fast and easy for a wide variety of sizes and materials. Heavy Duty Punching Dies are available in a wide range of die patterns, including Wire-O®, Plastic Coil, Plastic Comb, VeloBind®, loose leaf styles, and more.