Uncommon item. Since the blade opening is visible, it can be used for adjustments, and I think it's convenient for attacking edges. Other uses might include repairs for damage in the inside corners of finished hardwood flooring baseboards. Also, it says "和鉄" (wa-tetsu), so it might be tamahagane (jewel steel). Please refrain from price negotiations except for bulk purchases. Also, please consult in advance for bulk purchases.