Wen 61782 is a heavy-duty pneumatic coil roofing nailer designed to install 11GA(0.12” diameter) roofing nails of various lengths from 7/8" to 1-3/4". The fastener collation angle is 15 degrees to 16 degrees. The magnesium alloy body and cylinder cap lighten the tool but maintain high strength and rigidity. It is best used with a filter, a pressure regulator, and an automatic oiler located as close to the tool as possible (within 15 feet is ideal). All compressed air contains moisture and other contaminants that are detrimental to internal components of the tool.