Tombow Mono Zero Eraser has been designed with an ultra fine tip for precision erasing. Retractable, in a pen style body, this high quality eraser allows you to erase only what is needed. Available in 2 shapes, a 2.3mm round tip and a 2.5mm x 5mm rectangular tip. Ideal for designers, architects, artists, students and cartoonists. Refillable. Refills sold separately.