Package Contents: You will receive 4 pieces of dog nail grinder replacement heads, which can be used interchangeably for longer life. Product Material: Replacement parts are made of solid brass shaft and diamond wheel. The brass shaft provides high stability, and the diamond wheel is strong and wear-resistant. Product Advantages: These replacement heads can be cleaned with water after removal; simply wipe dry. Designed to help maintain your dog's nails. The nail grinder replacement head features a solid brass shaft for extended life and improved stability. Replacement heads are easy to clean—remove the grinding head from the device and clean as needed. Easy To Use & Install: These dog nail grinder replacement heads are easy to install. Remove the old head and insert the new one, ensuring it is securely in place. Color: Gray Material: Diamond Size: 21x13mm Package Contents: 4 x Dog Nail Grinder Replacement Heads Note: Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3cm. Please allow 1-3mm error due to manual measurement. Images may not reflect the actual color due to lighting and monitor differences.