The Ultra Beauty Collection Nail Buffing Cube is designed for a complete nail care routine. Featuring four sides for filing, buffing, smoothing, and shining, it ensures salon-quality results at home. Key Features 4-step nail buffing system File, Buff, Smooth, Shine Easy-to-use design Compact and portable Key Materials: Foam/Plastic Core; Multiple sides of abrasive material (varying grits).Ultra Beauty: Innovators in beauty tools and accessories.File Nails With Side 1, Buff With Side 2, Smooth With Side 3, And Shine With Side 4.Do not use on damaged nails. File/buff gently to avoid thinning the nail plate.