Grits include; 180, 260, and 360 grit. Set includes four flat files of each size. The base metal on these measure: 3/32 x 5/16 inch, 3/32 x 15/64 inch, 5/65 x 5/32 inch, and 1/16 x 5/64 inch. The grit is coated on making the diamond coated portion slightly larger.