1.New metal. This sharpener is only one made by Aluminium alloy in Aliexpress
2.New angel adjust system.Accurate setting of grinding angle.Angle memory system set
3.New flip fixture system flipped over to sharpen other side while retaining the same exact angle and edge (proprietary technology)
4.Innovative Patented Abrasive Holding System, Suitable for Various Abrasives
5.Silent smooth guidance system
6.Suitable for cutting edges of various shapes
7.Adjustable Ergonomics handle.Nice touch
