Precision is our first mechanical pencil, adding to the extensive Derwent range of artists' materials. Ideal for sketchers and technical drawing professionals alike, it boasts a premium metal barrel which has been designed for optimal grip and balance. Available in two sizes (0.5 & 0.7mm) with two degrees of graphite lead, HB & 2B. Derwent Precision Mechanical Pencils include a built-in eraser under the push button cap and the retractable nib makes them pocket-safe. The leads have a strong point for extended use and minimal breaking. Precision has a smooth laydown of graphite, suitable for fine detail and cross hatching techniques.