SPA DERMA ROLLER 0.5MMSPA DERMA ROLLER 0. 5MM is a day spa quality roller that helps to remove stubborn Fat, Pores, and Dead Skin cells, leaving your skin feeling smoother and healthier. With an ever growing list of features, SPA DERMA ROLLER has something for everyone. It is the perfect way to improve your skin complexion and texture. By rolling it over your skin, you're able to reduce friction and deliver gentle exfoliation that helps remove built up cells and hyperemia.