Features: Various fitness: Widely applied for polishing and grinding of microelectronic equipment and other objects. Conducive to rust removal, sanding, deburring and removal of residues. Useful tool with nice work performance: Efficient precision metal polishing effect. Great grinding effect and long service life. Small grinding wheel with handle, no dust pollution. Easy to grind, simple to use, safe and reliable. Specifications: Material: abrasive wire, metal Size: Diameter of the grinding head: 22 mm, 25 mm Shaft diameter of the grinding head: 3.0 mm Color: as shown in the picture Package contents: 8 x White cloth wheels 8 x Yellow cloth wheels 8 x Felt wheels 8 x Loose felt wheels 8 x Fine wool wheels 10 x Rubber grinding heads 8 x Polishing brushes Warm notices: When performing any type of high-speed grinding or polishing, always wear goggles and a dust mask. You can test it in a small area first before applying it to a large area. The polishing wheel has a longer service life at low speeds and requires a delicate touch, too fast speed will affect the service life. The dimensions are measured by hand and may have a little error, please don't mind. The colors may exist slight difference due to different screens. Small parts are included, please keep away from children under 3 years old.