UCHIDA KD Stainless Steel Ruling Pen (1-703-2500) by Uchida, with a list price of 2900 yen. This type is widely used by engineers and students alike. It uses high-hardness stainless steel, making the blade tip less likely to wear down, and the blade tip has a side-opening mechanism. This item was in a stationery store that has closed down. It is a new, unused item, but there may be minor scratches, stains, and sun damage due to aging. Please understand this before purchasing. Therefore, it is being sold for about half the list price, so please be aware of this if you are looking for a pristine item.