Everyone knows the importance of the right tool for the job. The large hook blades are designed with unique features for trimming roofing materials, linoleum, carpet fabrics and sheet materials. Due to our patented S3 technology, our hook blades are stronger than ever and provide better performance than a standard heavy duty blade. These blades have a deeper hook for cutting even thicker materials and fits most standard utility knives. Our application specific packaging reduces the confusion around selecting the right blade for the right job.