These steel balls are revolutionary! Their high-quality construction and precision have definitely enhanced the performance of my bearings... They are ideal for use in industrial and scientific settings, as they are highly resistant to corrosion and wear and tear. Their hardness and smooth surface finish make them perfect for demanding applications. The only downside is that they can be a bit costly, but the quality of these balls definitely makes up for it. Overall, I would highly recommend them for all your power transmission needs..