Mohs Hardness Test Kit – 4 Pack, 2-9 Scratch Tester Pen, Stainless Steel Hardness Picks with Storage Box, Single and Dual Head Design, for Mineral, Gemstone, Floor
【Dual-End Hardness Design】 Each hardness pen features writing needles with different hardness levels at both ends. The Mohs hardness scale pairs are: 2&3, 4&5, 6&7, and 8&9.
【Stainless Steel Construction】 Made of pure stainless steel. The set includes 4 hardness pens, each measuring 155mm in length.
【Multi-Faceted Shape】 The hardness test pen features a multi-faceted shape designed for practical handling and extended use.
【Storage Box with Testing Accessories】 The storage box includes a grindstone striped plate magnet, along with aluminum plates, brass plates, and glass plates of different hardness levels for mineral identification.
【Wide Application】 Suitable for ceramic tile, floor, glass, mobile phone screen, mineral, concrete, and more.