Smith's SPSK Standard Precision Sharpening System Premium honing solution cleans and protects the sharpening surface Fabric pouch for storage V-Lock vice holds knife at perfect angle during sharpening Folding rod guides allow sharpening at multiple angles Stone Size:4" x 1/2" x 1/4", Abrasives: Coarse Diamond 325 Grit, Fine Arkansas 1,000Grit, Medium Arkansas 600 Grit