Its roller head is made of micro-abrasive diamond roller heads which are quite efficient in removing the tough callus.
The handle comes with an ergonomic shape that ensures the hand is comfortable during its use.
You can replace the roller heads once they are worn out as they are easily detachable.
It is very light to allow for quick and even hand movements during use.
It is powered using batteries which you will need to keep replacing thus incurring extra costs.