The Wahl Nail Grinder safely grinds and smooths your Pets nails. The 2-speed battery pet nail grinder comes with a protective cap that allows you to file each nail without accidentally rubbing the grinding stone against your pets paws. The innovative grinding stone shape not only allows you to file your pets nails, but the rounded top design also allows you to round your pet nails for a smooth even finish. The unit is battery operated and included are 4-AA lithium Batteries.Instructions on how to trim your pets nails are also included.