REPLACEMENT GRINDING BANDS: For use with FURminator Nail Grinder for at-home nail trimming on your pet. CONTAINS 6 REFILLS: Replace when your Grinding Band appears worn or when it becomes more difficult to file your pet’s nails. 120-GRIT GRINDING BANDS: Gently files pet nails with ease, leaving a smooth finish. USE REGULARLY: Untrimmed nails can cause your pet sore feet, legs and hips as well as overall discomfort. EASY REPLACEMENT: Just use a screwdriver to remove the old Grinding Band and insert a new one.