Feature *Great vision aid at home or work; popular for electronics repair, embroidery, coin stamp collecting or as a general reading aid. *Highly-versatile magnification tool used by professional jewelers for extra-fine detail work like diamond setting or watch repair. *Five interchangeable lenses with 5 magnification powers/focal range (viewed object distance from lens) 1.0X 24", 1.5X 15", 2.0X 7-11", 2.5X 6-10" and 3.5X 4-7".