OPI - Elegantly Smooth Mini File-10PC - Display 10PC. Limited Edition Mini Rhinestone Crystal Nail Files Smooth your nails with a limited edition rhinestone accented crystal file! Product Description: Prevent nail chipping and peeling with OPI's Crystal File that delivers fast results with extra benefits you and your clients will love! The uniquely hardened glass features an everlasting abrasive surface that is permanently etched into the glass. The ultra-fine-textured grit is the ideal filing medium for natural nails, and won't promote chipping and peeling like other files can. And the 100% nonporous glasscan be sanitized and disinfected between services for use on all your natural-nail clients. For best results, dampen the Crystal File before use and recommend that clients store their OPI Crystal File in the protective tube.