Features:1. 100% Brand new and high quality.2. This sharpening stone is made of extra-hard aluminum oxide，and is double sided with coarse grit and fine grit.3. Corundum and white fused alumina.4. Material:Alumina oxide plus carborundum composite stones.5. Grit:Oriange 400/Grey 1500.6. Ideal size for bench work.7. Intended for sharpening all types of tools and knives.8. Dimension:9.8cm x 3.5cm x 2.2cm - 3.86inch x 1.38inch x 0.87inch. Package Contents:1 x Sharpening Stone