Cardboard trimmer pads wear out too fast and cause spine blowout on heavy perfect binding runs. Our heavy duty binder trimmer press pads are a long lasting alternative. You install them whole and let your trimmer knives cut them to the exact size of the book block on the first strike with no risk of blade damage. They resist silicone spray flaring and keep your finished edges crisp. We stock options ready to ship for Kolbus and Muller Martini systems, including the 1576 and 3670/71/72/75 series.