This 3-pack replacement grinding heads set is specially tailored for Lopsic S5 Pro pet nail grinder, ensuring a perfect fit and stable performance during use. The set includes 2 coarse sand grinding heads and 1 fine sand grinding head, perfectly matching different pet nail conditions—coarse sand is ideal for fast trimming thick, hard nails of large dogs or pets with overgrown nails, while fine sand is used for polishing after trimming, making pet nails smooth and preventing scratches on furniture or human skin. Made of high-quality, wear-resistant sand material, the grinding heads are sturdy and durable, not easy to shed sand or wear out, ensuring long-term use. With tool-free replacement design, you can easily install or remove the grinding heads in seconds, no complicated operation required. This practical replacement set is a must-have accessory for your Lopsic S5 Pro pet nail grinder, helping you achieve efficient and safe pet nail grooming at home.