Dotco 12-20 Series Nibbler. Dotco 12-20 Series Nibbler is perfect for accessing tight areas, and it is suitable for general industry use. Dotco 12-20 Series Nibbler features durable composite housing. Dotco and Cleco specialty tools assist operators in the worlds toughest industries, offering durability, precision and satisfaction. These tools are constantly evaluated for possible improvements, and each is made with only the best materials available. Exhaust: Rear Capacity: 18 ga. Mild Steel Speed SPM: 6 Type Housing: Composite Weight: 1.10lbs/0.50kg Overall Length: 8.3”/211mm Air Inlet Size: 1/4”