This sharpener is designed for standard-size graphite pencils as well as thick graphite and colored pencils, accommodating sizes up to 10.2mm | Its slim profile ensures a perfect fit for pencil cases, making it a convenient tool for students and professionals alike | Additionally, the sharpener features a hinged cover to prevent spillages, keeping your workspace clean and tidy | * For standard-size graphite pencils and thick graphite and coloured (up to 10.2mm) | Slim profile design, perfect fit for pencil cases