The Stanley 0-11-952 Concave Trimming Blade is a specialist replacement blade designed for precision cutting applications where accuracy is critical. The unique concave cutting edge makes it ideal for detailed work such as leather trimming, marquetry, inlays, and other fine craft or trade applications. Manufactured from high-quality carbon steel, these blades provide sharp, clean cuts and are compatible with most Stanley utility knives (excluding the 10-550 Titan and 10-199 Fixed Blade knives).