1Made from high quality plastic, durable and very convenient. 2This compact electric eraser can erase small areas on artwork quickly and precisely. 3Moderate size suits hands perfectly, portable and comfortable to hold. 4Equipped with 10pcs 2.3mm eraser refills and 10pcs 5mm eraser refills that you can change the size of the core, and the length of core can be adjusted. 5Labor-saving and effective, perfect stationery for art students, teachers and those drawing lovers.