Stanley 11-937V Drywall Utility Blades, 5-Pack Engineered to easily cut abrasive drywall material Double hardened blade edge for increased* cutting life 100-Percent longer life on average compared to Stanley11-921 Heavy-Duty Blade Cuts and scores drywall, ceiling tile, wallboard and similar materials. Drywall callout is laser etched on blade to prevent mixing with standard blades Limited Lifetime Warranty