Second set of 7 instruments for hygienic reasons we recommend that the co user employ a second set of attachments this way you need not sterilise the instruments each time contains no 1 2 2 diamond coated grinding points for gently removing hard skin from fingertips toes and heels no 3 4 2 ceramic grinding points for shortening and immaculately filing fingernails and toenails no 5 1 polishing felt for a beautiful natural shine of your nails no 6 1 cleaning brush