A fantastic inspection tool. The black lens housing prevents reflections while the casing is made out of high-grade stainless steel which makes the magnifier in all very robust providing the lenses with maximum protection in tough working conditions (as in the field or where it can receive many knocks). The loupe-head is riveted to the casing to avoid it coming loose as compared with screws.
The lenses are scratch-resistant and produce a very sharp and extremely high contrast image. Schweizer uses a UV absorbent optical crown as used with prescription lenses (refractive index n=1.52).