This product is definately not stainless steel. Stainless steel does not rust, especially after the firt use. I used it, sterilized it, air dried on clean paper towel for 24 hours, then when dry put the roller away. One week later, I came to use the roller and was really annoyed to discover a lot of the roller needles had rusted. The rust even bled onto the plastic. I would say approximately 50% of the needles had rust on them. I could have purchased a much cheaper product but thought it better to go for middle of the range. Very big mistake.