PSI Woodworking Products DIAMOND4 4-Piece Sharpening Set Flat sharpener: 6-Inch long by 1-Inch wide Round sharpener: 4-Inch long, 1/8-Inch to 3/8-Inch diameter Narrow cone sharpener: 6-Inch long, 3/8-Inch to 3/4-Inch diameter Wide cone sharpener: 8-Inch long, 3/4-Inch to 1-1/4-Inch diameter Makes it easy to keep your cutting tools sharp