★ Tips: Forged tips offer superior hardness and precision, allowing you to handle a variety of hard materials with ease and providing greater durability!
★ Hardness test kit: It is a multi-faceted shape that has been carefully processed to make it more convenient and durable to use.
★ Excellent Quality: We offer you this impeccable hardness pen. It is more convenient and durable to use.
★ Wide application: Mohs hardness tester pen, hardness measurement, this hardness test pen is suitable for gems, jade, ceramic tiles, floors, glass, mobile phone screens, minerals, concrete, etc.