It's a fact of life: Knife blades break—and often. Unless you have this one, which the manufacturer claims is the first shatter-resistant blade for utility knives. Ideal for cutting many surfaces, the blade has an edge that stays sharp for up to three times longer than traditional carbon steel blades, the company adds. Because it has a flexible spring steel backing, the blade also is shatter resistant. It is available in packs of three, five, 50, and 100.Cost: $2 to $50. Lenox. 800-628-8810. www.lenoxsaw.com. Circle no. 101.