The Cathedral Paper Trimmer Replacement Cutting Blade will ensure that your cuts will always be sharp and accurate. The ground rotary cutting head is designed for use with the Cathedral A4 and A3 paper trimmers. To replace the blade, just unclip the end cover, slide the bar out of its guide, then slide the cutting head off the bar. You'll be able to fix your new blade in place to ensure continued precision, perfect for a huge variety of projects. For use with Cathedral A4 and A3 paper trimmersGround rotary cutting headFitting instructions includedPerfect for ensuring sharp, accurate cutting every timeCathedral Paper Trimmer Replacement Cutting Blade. self healing cutting mat