First run your knife blade over the Tungsten Sharpener to quickly sharpen the edge and then run it over the Ceramic Sharpener to hone it razor sharp. Measures 8" x 2-7/8" x 1-5/8". Gift boxed. Features: Double Sharpener Tungsten Sharpener & Ceramic Sharpener in One Measures 8" x 2-7/8" x 1-5/8"