These are wire brush ,and mini brush .

It used for polishing

Wire Brush Solid ring construction to ensure that the brushes run smoother and longer with less vibration Fine wire for polishing steel, copper and brass Preparation of metal surfaces for soldering, welding & painting Coarse for preparation of metal and rubber surfaces during adhesive bonding. Removal of rust, scale, slag, and paint

1/4" shank size 4,500 safe max RPM