1、Alloy Steel Material: Alloy steel has higher strength and toughness than carbon steel, wear resistant and durable, suitable for long term work. 2、Double Ended File: This file has a double ended design, making it flexible for engraving and milling work in narrow areas. 3、Quick Grinding: The double ended file can complete quick grinding, saving time and improving efficiency for users. 4、Wide Application: This file has a wide range of applications, in addition to grinding, polishing, peeling, de corrosion, and engraving. 5、Thoughtful Gift: This set of double ended files is very durable, and if you have family and friends who are woodworkers or love to carve, this will be the best gift for them.