The OilEasy Wrench is specifically designed to remove the oil filter on any aircraft using the Continental IO-520, or IO-550 engine. It’s the only wrench that can get between the top of the oil filter and the pressure pump and still provide enough leverage to remove the old (usually stuck) oil filter by hand. And because you are able to remove the old filter without any damage, your inspections of the old filter are more accurate, without any contamination from more extreme filter removal methods. 1 lbs (0.5Kg) shipping weight.