Crack magnifier
The thread count is made of a strong magnifying glass and a sheet of glass with engraved scale with 0.1 mm pitch.
Crack widths up to 20 mm can be so fast to measure reliably and accurately.
Matt chrome all-metal housing with silica glass lenses, 8-fold magnification.
For transport in a jacket or pants pocket folds up the thread counter.
Case for Precision crack magnifier (not pictured): 10.00€ + ΦΠΑ