NIB sealed Irwin Bi-Metal Snap Blades 3-Pack 2086403 fits most 18mm snap knives

New in package Bi-Metal snap blades are produced through a patented process of combining two types of metal, spring steel and high speed steel Spring Steel allows the blade to bend without accidentally breaking It also ensures that the blade snaps cleanly on the score every time High-Speed Steel Delivers a hardened cutting edge that stays sharp 3x longer than traditional carbon blades