THE MILWAUKEE‚ NITRUS CARBIDE, EXTREME MATERIALS UNIVERSAL FIT OPEN-LOK, OSCILLATING MULTI-TOOL BLADES PROVIDE THE ULTIMATE CUTTING EXPERIENCE, DELIVERING THE FASTEST CUTTING AND LONGEST LIFE ON THE JOBSITE. THE EXTREME MATERIALS NITRUS CARBIDE, MULTI-TOOL BLADE DELIVERS 2X MORE CUTS THAN CARBIDE TEETH BLADES - CAPABLE OF HUNDREDS OF CUTS IN SCREW-EMBEDDED WOOD. THE EXTREME MATERIALS BLADE IS IDEAL FOR THE FASTEST CUTTING IN SCREW-EMBEDDED WOOD, NAIL-EMBEDDED WOOD, PLASTER, CEMENT BOARD, DRYWALL, AND PVC. THE NEW UNIVERSAL FIT OPEN-LOK ANCHOR IS REINFORCED FOR ADDED STRENGTH AND CONTROL AND ALLOWS FOR QUICK BLADE CHANGES ACROSS 100+ MULTI-TOOLS. NOT COMPATIBLE WITH STARLOCK TOOLS. MILWAUKEE‚ OSCILLATING MULTI-TOOL BLADES ARE DESIGNED AND MADE IN THE USA WITH GLOBAL MATERIALS. AVAILABLE IN 1, 3, OR 5 PACKS.