General description Thick, solid, and large whetstone made of professional-grade white corundum, perfect for sharpening larger chef's knives. It provides a spacious working area for any size of knife and is both corrosion-resistant and heat-resistant. The stone features two grit sides: 400 grit for good metal removal and light scratches, and 1000 grit for a frosted edge appearance, achieving sharpness comparable to most factory edges on knives and tools. Technical specifications Material: White Corundum Color: Light Green + White Dimensions: 18 cm x 6 cm x 3 cm (7.09 in x 2.36 in x 1.18 in) Weight: 19.75 oz Installation Soak the sharpening stone in water for 5 minutes. Place the stone on a steady surface, such as a table or desk. Usage Use the 1000 grit side for coarse grinding at a 10-30 degree angle, applying slight force for about 15 minutes. Switch to the 400 grit side for fine grinding, taking approximately 10 minutes. After sharpening, clean the stone with a wet cloth or water,