The STANLEY 11-921 Heavy-Duty Utility Knife Blade is a high-quality replacement blade designed for general-purpose and heavy-duty cutting applications. Manufactured from high carbon steel, it offers excellent strength, durability, and long-lasting sharpness for consistent cutting performance. The precision-honed cutting edge ensures clean and accurate cuts through materials such as cardboard, carpet, vinyl, leather, paper, plastic, and other sheet materials. Designed to fit most standard utility knives, this versatile blade is ideal for professionals, contractors, warehouse personnel, and DIY users. Whether used for construction, packaging, flooring, or general maintenance, the STANLEY 11-921 provides dependable cutting performance and long service life.