THIS PACK OF 10 SILVER SNAP-OFF BLADES IS A LIFESAVER WHEN YOU'RE BUSY WORKING ON A PROJECT. SIMPLY INSERT A BLADE IN YOUR OLFA KNIFE AND YOU'VE GOT 130 MORE BLADE EDGES TO WORK WITH. THE BLADES ARE DESIGNED TO THROUGH PACKAGING SHRINK WRAP VINYL WINDOW FILM WALLPAPER CAULKING FOAM BOARD AND OTHER MATERIALS. 13-SEGMENT 9MM SNAP-OFF BLADE. MADE FROM HIGH-QUALITY CARBON TOOL STEEL. DOUBLE-HONED BLADE PROVIDES SUPERIOR INITIAL SHARPNESS AND EDGE RETENTION. EXACT 59-DEGREE EDGE ANGLE OPTIMIZES CUTTING POWER AND MINIMIZES BLADE BREAKAGE. PACKAGE QUANTITY 50. MUST BE 18 YEARS OR OLDER TO PURCHASE THIS PRODUCT.