Handy to Use: The fingernail brushes are made of plastic handle and the PP hair silk bristles, soft but firm bristles. For Cleaning Dirt Under the Fingernails and Bristles, non-irritating to your skin, easy to remove and scrub the dirty stuff and dust under your nails, proper curve of the scrubbing nail brush to make it not slippery when using, handy, safe and comfortable to use.