Essentially the mechanical pencil version of an eraser. Simply click the button to advance the eraser, hold in and push to retract. Designed for precision erasing this is a wonderful tool for all sketchers. Simply refill when the eraser is finished. * 20mm long and approx 8mm diameter * Rectangular elastomer eraser is 5mm x 2.5mm * Refillable * Made in Japan **About Tombow** Founded in 1913, Tombow is a Japanese family company that manufactures high-quality and reliable writing instruments. View other Tombow products we sell here