OLFA 25 mm Black UltraSharp Snap-Off Blades - Pack of 20 These heavy-duty blades are designed for more demanding materials and projects. Put them to the test, and they'll pass with flying colors. Use these blades for cutting industrial materials such as gaskets, conduit, belt synthetics, rope, leather, laminates, plastics, fiberglass, rubber and textiles. FeaturesFits OLFA PRO 25mm utility knivesUltra-sharp black blade has a 25% sharper edge for less cutting resistanceConstructed from premium carbon tool steelExact 59-degree edge angle optimizes cutting power and minimizes blade breakageSeven segments per bladeSpecificationsNumber Of Points: 7Blade Width: 25MMApplication: General PurposeConstruction: Carbon SteelBlade Shape: ParallelogramMaterial: Carbon SteelBlade Type: Snap-Off UtilityCutting Edge: 1