Makes the nail surface even and smooth with 1000 grit and 4000 grit gives a natural shine to the nail ( like a top coat nail polish)
Compared to the price paid it is an average product. I have used nail buffers from lesser expensive brands which give the same result.
The product gives your nails the shine it claims to give. The only issue i have with the product is how long the grit lasts. This shiner lasted me about four months.
Its just one sided shiner for 500 bucks... Just any other shiner but since OPI is a reputed brand I expected it to be better and more useful..