For extreme sharpness with lasting edge retention, choose OLFA Dual-Edge Safety Blades. Manufactured from high carbon tool steel with a two working edges for extended blade life. Available in packs of 5, 10 or 50. Each pack comes in a plastic storage case for convenience. Fits OLFA models: UTC-1 Utility Knife, SK-4 Semi-Automatic Self-Retracting Safety Knife, and SK-9 Semi-Automatic Self-Retracting Safety Knife with Tape Splitter

• Dual-edge design doubles blade life
• Fits OLFA modes UTC-1, SK-4, and SK-9