【 Sturdy and Resistant to Damage 】 Made of high hardness material SK5 that resists deformation , the utility knife hook blade is finely polished for exceptional sharpness . Hook shaped design balances stress to avoid blade breakage . 【 Unobstructed Smooth Cutting 】 The utility knife blade features a hook shaped edge design that reduces space obstruction , Use these blades for intricate cutting in tight spaces enabling smooth , flexible cutting to shape materials as desired 【 Safer Protection for Peace of Mind 】 The roofing hook blade features a recessed blade design that lowers injury risks if dropped and minimizes direct hand blade contact , enhancing safety 【 Strong Compatibility with Multiple Materials 】 The hook blade works seamlessly with felt (carpet) , wallpaper , integrated ceiling materials , hard plastics , and more , for versatile use 【 Compatible with Most Utility Knives 】 The heavy duty hook blade fits most utility knives for efficient and convenient cutting, Manufacturer: PATNFR