7pc Assorted Sharpening Stone Set. Great for sharpening, knives, scissors, gravers, blades, chisels, etc. Set includes: 5/8 x 6 inch square, 1/2 x 1/4 inch rectangle, and 5/8 x 5/16 inch half circle 180 grit green silicon carbide stones; 7/16 inch round, and 7/16 inch triangle 180 grit pink iron oxide; and 9/16 inch square and 1 x 3/8 inch knife 150 grit brown aluminum oxide stones. Stones area about 5 7/8 inches long. Note: due the delicate nature of this product, we cannot guarantee that there will not be damaged edges or broken stones.