The Dremel 7300-PT 4.8V Pet Nail Grooming Tool is the best dog nail grinder because it’s fast enough to go through nails quickly but is still easy to control. We also like that it is rechargeable and quiet, and has swappable grinding tips.
The Dremel offers two speeds, low and high, which are accessed by flipping the switch in opposite directions as opposed to moving twice in the same direction. This prevents you from accidentally changing speeds and frightening your dog with a sudden burst of speed. Even on low, the Dremel provides enough power to file down nails efficiently, though the lower speed will take longer than the higher speed. The highest setting on other models we tested, like the Wahl, couldn’t come close to the filing power of the Dremel’s low setting.
The Dremel comes with a rechargeable battery pack, which we prefer over models that use AA batteries. The pack fits into a wall charger (included in the box) when not in use (it takes three hours to fill), and slots into the grinder itself quickly and easily when it’s time for a trim. It makes the Dremel a touch heavier than the Oster, and significantly heavier than any of the other models we tested, but the additional weight is well worth the convenience of rechargeability. Both the battery and charger are compatible with a number of Dremel models and can be replaced individually should something happen to either.
Despite having oomph under the hood, the Dremel is surprisingly quiet for such a sturdy grinder, especially compared with competitors like the Furminator. Its motor doesn’t create an unpleasant high-pitched whine, even on high speed. It comes with two bits: one to grind and one to polish. The grinding bit worked perfectly, and the polishing bit will eventually make your dog’s nails shiny, if you care to put in the time and effort. That said, we recommend pairing the grinder with diamond grinding tips because they last longer and provide more consistent filing than the ones that come bundled with the grinder.
The grinder we tested is the pet-specific variant of Dremel’s 7300 kit, which is available with different assortments of bits for various tasks and hobbies. Another kit, called the Dremel 7300-N/8, has the same base model number and is marginally cheaper than the 7300-PT at the time of writing—but in our hands-on testing, the 7300 N/8 was more powerful, louder, and a bit harder to control, so we’d recommend sticking with the pet version.