Great investment - Bausch & Lomb Folding Pocket Three-Lens Magnifier Loupe 81-23-67

I use use it at work to look at parts after there and have to read the cavity numbers from time to time and there hasn't been one that I haven't been able to read, the parts are different shapes and sizes and evendors colors so the 3 different lens are the most important thing cuz different colors are hard to see