Set includes 1 piece brush each in stainless steel, brass and nylon in the following sizes: 1/4-Inch, 3/8-Inch, 1/2-Inch, 5/8-Inch, 3/4-Inch and 1-Inch Choice of stainless steel, brass and nylon brushes makes this kit ideal for auto-repairing and polishing Suitable for polishing and cleaning areas of autos, machines, etc