The Tombow 57336 Mono Knock Eraser (Blue) is a premium pen-style eraser designed for smooth, precise, and effortless erasing. Featuring an easy-to-use knock mechanism, this eraser allows quick extension of the eraser tip while keeping it protected when not in use. The rubber grip ensures a comfortable, non-slip hold for excellent control during writing or drawing. Known for Tombow’s high-quality erasing performance, it removes pencil marks cleanly without smudging or damaging paper. Ideal for students, professionals, and artists, this sleek blue Mono Knock Eraser is perfect for school, office, and creative work.