Pre-sharpened and made with thick, soft 3.3 mm leads that don't break easily under pressure. Bright colors provide smooth, scratch-free laydown and are perfect for color mixing and blending. Trayolaï¿½ tray is convenient, reusable and stackable. AP Certified nontoxic to ensure health and safety. Mechanism: N/A; Pencil Type: Drawing; Lead Color(s): Assorted; Grip Type: N/A.