Pocket hardness scale (5-9)
Product number:
I160
Product information "Pocket hardness scale (5-9)"
Six conically ground mineral points, set and engraved on both sides of three metal rods for the different degrees of hardness.
Hardness grades: 5; 6; 6.5; 7; 8 and 9.
Supplied in black leather case with explanations.
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