HARDNESS PENCILS X8 (MOE 2 TO 9) + PLATES X3 Magnification_Multi magnification Overall we think they last

Overall we think they last well

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I don't do surgical operations

Refractometer (optical not electronic) (Refract-L)

HARDNESS PENCILS X8 (MOE 2 TO 9) + PLATES X3 Magnification_Multi magnification Overall we think they lastSummary Set of ten hardness testers. 8 hardness picks ("pencils") from No. 2 to No. 9. 1 Glass plate (hardness 5. 5) 1 Brass plate (hardness 3. 5) Also 1 streak plate (to test a mineral's streak colour) 1 magnet 1 polishing stone to keep the tips sharp Each 'pencil' has a tip of a different hardness from No. 5 to No. 9 on the Moe scale of hardness (see 'Further Information'). Is it easy to use? Yes. See which will scratch your sample and which will