THESE SEVEN-SEGMENT SNAP-OFF BLADES LET YOU ""CHANGE"" YOUR KNIFE BLADE IN A SNAP THE PACK INCLUDES FIVE BLADES GIVING YOU HOURS UPON HOURS OF RELIABLE USAGE. USE THESE BLADES FOR CUTTING INDUSTRIAL MATERIALS SUCH AS GASKETS CONDUIT BELT SYNTHETICS ROPE LEATHER LAMINATES PLASTICS FIBERGLASS RUBBER AND TEXTILES. FITS OLFA PRO 25MM UTILITY KNIVES. DOUBLE-HONED BLADE PROVIDES SUPERIOR INITIAL SHARPNESS AND EDGE RETENTION. CONSTRUCTED FROM PREMIUM CARBON TOOL STEEL. EXACT 59-DEGREE EDGE ANGLE OPTIMIZES CUTTING POWER AND MINIMIZES BLADE BREAKAGE. SEVEN SEGMENTS PER BLADE. MUST BE 18 YEARS OR OLDER TO PURCHASE THIS PRODUCT.