Irwin Replacement Blades Trim Knife 3 Pack Patented Bi-Metal High Strength
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• 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.