The 35-450 Pocket Brinell Optical Scope from Newage is an economical, 20X optical scope for reading Brinell impressions. The compact design and fixed focus makes this pocket scope ideal for applications where you need a quick, but economical method for measuring the indentation.
A standard flashlight source, powered by a AAA battery, supplies the illumination. The reticule is calibrated in 0.1mm graduations with a range of 6mm and a field diameter of 7mm.