3 Pack, ASB, New Drywall Application Specific Blade, 100% Longer Life Compared To Stanley 11-921 Heavy Duty Blades Stanleys S3 Technology Creates An Edge On The Blade That Is Double Hardened For Increased Cutting Lifecuts & Scores Drywall, Ceiling Tile, Wallboard & Similar Materials, Blade Changing Reduced For Improved Productivity.