Brushless spot repair sander with a random 3 mm and 5mm orbit. The battery-driven Mirka® AOS-B 130 and Mirka® AROS-B 150 are small, ergonomic and energy efficient. There are no cord to get tangled and no air supply that can get contaminated; this tool does not even require oiling. The max 12V Li-ion battery lasts up to 16 hours in industrial use and charges in 45 minutes.