Model FDL90 is a compact, fold-out linen test magnifier featuring a 2x power 90mm diameter lens along with a 4.5x power spot lens. The FDL90 contains markings in both inches and centimeters for easy measuring of small parts and a super bright LED light illuminates the object. It is perfect for stitch counting. This magnifier is portable, lightweight and folds flat for storing when not in use.