To ensure the best experience with a Dog Nail Grinder you need to properly maintain it, it is recommended that you replace the grinding head every 2 – 3 months. - Made with a high quality diamond bit, the standard filing solid wheel will ensure that your pet grooming routine is quick and pleasant. - Features:High quality diamond bit: dog nail grinder wheels are made out of solid diamond emery material - Washable: dog nail grinder head has been designed so it can easily be washed - Easy to use; to replace the dog nail grinder bit, simply pull out the old one and push in the new - Suitable for smaller pets with smaller and finer nails - Results in a smoother, polished nail - Specifications: Compatible with our Pet Nail Grinder: N8, N9, N10, N20Model: MR – 001Wheel Type: Standard/Fine/Smooth Filing - Dimensions: 1.9(L) x 1.27(W)Material: Diamond Package Includes:Standard Diamond Grinder Replacement Head.