GLASS SHARPENING STONE: This sharpening stone will help you go from dull to razor sharp quickly and with ease. MATERIAL: The higher density stone allows for faster sharpening EASE OF USE: No need to soak stone in water before use. Simply wet stone surface. KNIFE RESTORATION: Keep your knives razor sharp with an extra-fine finish; 6000 grit for finishing the sharpest edges with a mirror polish SAFE SHARPENING: Silicone holder gives you a secure surface for sharpening; Helps prevent damage to work surface, and safer storage MERCER CULINARY: Mercer continues to introduce innovative, quality products allowing foodservice operations to run effectively and efficiently; perfect for professional use or the home cooking enthusiast