Replacement blades for Fiskars CarbonMax™ 18mm snap-off utility knives. CarbonMax™ blades featuring Fiskars’ proprietary, edge-retention coating that stays sharp up to 24x longer than standard utility blades. Besides that, the blades have been extensively laboratory tested and verified. In addition, the blade snaps off cleanly for a new sharp tip. Last but not least, pack includes 5pcs 18mm snap-off blades.