* It's mainly used for internal polishing when making bowls, jars, pen holders etc, also can be used when polishing the exterior. 
* The design of the pure copper universal head allows the sandpaper to touch any corner of the workpiece
* Equipped with three size sanding heads 30mm, 55mm and 75mm, which are suitable for sanding objects of different sizes. 
* The velcro on the sanding head is more convenient to replace back velvet sandpaper. 
* Coming with two pieces of each sanding papers 80 grits, 120 grtis, 240 grits and 400 grits for three size sanding heads.