Features: brand new and high quality. Because of its surface is smooth, not coarse, you can use it to polish craft product or other something. Diameter: approx 25mm/0.98 inches. This replaceable sandpaper pad is suitable for most this round type eletric callus remover machine. If you have a slight feet dead skin, you also can use it to polish feet or heel, make it more smooth. One disk one person, for ideal for nail salon or family use. Replaceable sandpaper disks can easily remove heel dead skin,dry skin and cracked skin,is a nice gift for wife,mother,daughter, girlfriend,etc. Specifications: Material: Stainless Steel Drill Bit Size: approx 31x25mm/1.22x0.98 inches Diameter: approx 25mm/0.98 inches Type: Drill Bit/Sanding Paper 80 grit/Sanding Paper 120 grit/Sanding Paper 180 grit Package Includes: 1x Sandpaper Disks note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.