HIGH QUALITY: pencils’ thick, break-resistant lead and high-quality graphite core formula provides extra smooth performance for an optimal writing experience. TRIANGULAR SHAPE: helps guide fingers to a proper writing grip for better-controlled writing and a more comfortable hold than round/hexagonal pencils; recommended by teachers around the world. PRE-SHARPENED: all 12 pencils are pre-sharpened and can be re-sharpened easily using any standard sized pencil sharpener; triangular shape has a circular diameter and is constructed with premium elmwood for durability and easy, clean sharpening. CLEAN ERASER: latex-free eraser cleanly removes graphite with no smudging or tearing; minimal pressure needed for clean erasing