The Helix Magnifying Glass with a bi-focal magnification feature enables you to produce a magnified image of any object placed underneath the glass Featuring a scratch resistant lens the Magnifying Glass helps to reduce any strain placed on the eye when focusing on small objects Includes 2 x magnification with a 4 x magnification insert option Bi-Focal magnifications: 2X with 4X insert for magnifying glass lens Lightweight for portability along with a handle for ease of use 75mm lens diameter