This is the "MONO Holder," a mechanical pencil holder specifically for 0.5mm leads. It is currently discontinued, making it a rare model that is difficult to find in stationery stores. It is also recommended for collectors. 【Condition】 ・The main body of the holder shows no noticeable scratches or stains. ・There may be very small scuffs from storage, but I don't think there is any significant damage. 【Included Items】 ・MONO logo-printed dedicated case ・A set of hardness indicator stickers