This special drain tool is used to drain the black plastic oil filter housings on cars with the engines including 2.0T and 2.5 liter gas. Using this tool prevents oil from gushing out of the housing when changing the filter element. Precision machined from aluminum comes complete with oil-resistant extra-flexible tubing and a pinch valve to minimize the mess. Once drained, the housing can be unscrewed using out Oil Filter Housing Socket (MN393400) sold separately. Metalnerd brand made in the USA.