this is extremely durable and super quiet. My dog gets afraid when we do his nails but it is much easier when we use the grinder. The grinder helps quickly trim the nails by sanding them down to the perfect length. There is no mistakes made when I am just taking a little bit off at a time. Wonderful way to get my dog's nails done without hurting them and causing them to bleed. This worked on really thick nails and also the dew claws which are smaller and thinner.