Stanley 11-937L 50 Pack Drywall Utility Blades Drywall utility knife Stanley - Black & Decker High Quality New!!!!!!! Laser-etched call-out on blade side to help prevent blade mix ups Drywall utility knife Double-hardened blade edge for longevity 100-Percent longer life on average compared to Stanley 11-921 heavy-duty blade Laser-etched call-out on blade side to help prevent blade mix ups