Tajima's premium hook razor blades come in a 5 pack for your convenience and are favourites of flooring, roofing and general contractors. Designed to prevent slip-off when cutting rigid roofing or flooring material. Premium grade deep hook blades designed to prevent slip-off when cutting rigid material. Japanese tempered steel produces maximum blade strength for long-lasting durability and performance. Thicker blade to track straight and resist shattering. Advanced multi-step sharpening to form a razor-sharp cutting edge. Optimized for cutting roofing materials, as well as flooring.