Material: Soft and high density sponge EVA conforms to shape of the nail without damaging. Usage: Suitable for salon or personal, home use. Function: These nail files are designed for buffing nails before applying nail art polish, proper size. Application: Suitable for nails, acrylic nails, manicure and pedicure tool. Nail Buffing Block: 100 quantity sided nail buffers can easily polish and nails for manicure and pedicure, will not scratch or damage nails.