This double-sided nail file for dogs was created by leading experts in nail and dog care and is made of crystal glass – superior material used for manufacturing the best nail files in the world. Non-porous surface does not absorb water and can be sanitized 100%. Reduces peeling and splitting of dog nails and does not disturb Dog Fashion Spa nail polish during touch ups. Guaranteed to last forever and never wear down, Dog Fashion Spa nail file is a must-have accessory for every dog.