High-grade whetstone ensures effective sharpening results. Double-sided sharpening design. Equipped with silica gel non-slip base guarantee safety sharpening. Stone is suitable for sharpening knives, woodworking, and gardening tools. Mesh & Micron: Mesh: 240# Micron: 53.1um Mesh: 1000# Micron: 9.1um. Hardness: HRB≥35. Hardness Scope of Knife: HRC≤65°. Grinding Material: Corundum. Stone size: 180*60*28mm/7”x2.35”x1.10". Stone Weight: 540gr./1.18Lb. Made in China.