We bought the Dremel sander and sander bands refills to groom our dog nails. We use it to sand our dog's nails. The sander is not loud, does not hurt, we let our dogs "sniff" it while it was off, then turned it on and let them "look" at it, (it will hurt them if their nose touches it while it is on). We started on the back paws having to turn it off and on because they were a bit afraid of it, but it wasnt loud, it just hummed. After doing one nail, we turned it off, did another nail, turned it off, but they soon got used to it and just let us finish. The battery lasted the entire time it took to do 3 medium dogs and the sander bands lasted for a session a month for at least 3 months. The Dremel, the sanding bands and the battery are all wonderful for dog grooming. PLEASE know that when you hold the dog paw, sand the nail sideways and then bottom to top, it hurt them when we sanded the nail top to bottom. Start off slow, do one nail just for a touch, turn it off, let them "sniff" it while its off, then do another nail just for a touch, and pretty soon the dogs will be used to it. You can see the nail bed as you are sanding, so you wont sand it too short. We save $36.00 a month at the vet.