I received the Scholl Velvet Smooth Pedi Electric Hard Skin Remover from Amazon Vine for review and was very impressed.
I think my review may be of use here is a link.Scholl Velvet Smooth Pedi Electric Hard Skin Remover
I would not buy spares however until you are sure that the machine is the one for you.
If it is than you need to buy these rollers?
But to ensure you get maximum use out of them here are a few tips from an old pro.
1. To get the best results you should wash your feet well first- this gets rid of a lot of stuff and lets the dog see the rabbit so to speak.
In other words soap and water are a heck of a lot cheaper than the roller replacements.
If you can get rid of a whole lot of hard skin easily before this means you are not wasting the rollers life and in a way your own by time.
Make sure you really dry the feet before using the rollers
2. Don't press too hard- this only slows the rollers and makes the motor groan like a 'past its sell by date Zeppelin'. Apply gentle and I do mean gentle pressure ensures the roller really smooths the hard skin.
Let the machine do the work for you.
It's just like going for a professional manicure. You don't file your nails down you let her do her job. Likewise you let the machine do its job.
4. A warning- there's dust! A fine cloud of...... well let's face it.. it is `you', your dust that is given off so make sure you do it somewhere where bits of you won't clog up stuff? Over the bath/toilet/bidet seems fine.
5. It says you can clean the rollers and machine with water under the tap.
I think an old toothbrush ensures a good clean and makes the rollers last longer.
Don't waste money by buying a replacement set of rollers until you have actually tried the machine.