Safe & Professional: Our pet nail grinders are designed exclusively for using on pets. Instead of cutting the nail, nail grinders file the excess nail down with a grinding head, leading to a smoother and more even result. Our grinders have advantage that they will not make nails bleed, they also keep your skin, cloth, floor and furniture safe from snags and scratches. - Three Size Ports:You can choose an appropriate port depending on your pet’s nail sizes and hardness. For larger pets, the cap can be removed to expose the entire wheel to easily grind large nails. - USB Charge & Guarantee: Our grinders comes with a USB wire for your charging convenience, the grinding wheels are durable, replaceable, and can be removed for cleaning. - Protective Design: Our pet nail grinder has protective designation, If there is too much pressure detected, either on yourself or the nails of your pets, the grinder will automatically stop spinning. Which means, the grinder is not broken, but protecting you and your pets. You can simply releases or decrease the pressure, it will start spinning again.