Ideal for everyday use; the Sketch is efficient; safe and easy to use. Suitable for sharpening graphite and charcoal; it starts automatically when your pencil is inserted and stops when it is removed. Auto Stop when sharp to prevent over sharpening. Safety feature cuts power when tray is removed. Effective thermal cut-out after 5 minutes of continual sharpening to protect the motor. Strong; sharp replaceable helical blade. For standard (8mm) diameter pencils. Weight 499g and dimensions 169 x 166 x 121mm. Each.