Review (1/5): Waste of money!
I purchased as backup/spare bits. I don't like these bits.
Complete waste of money. The ones I received don't even put the slightest dent into the takedown/debulking of acrylic nails. I didn't even try it on the hard gels because of how terrible they were performing.
I wish I wasn't so busy at the time I received them, because I missed the deadline to return them.