Replace Onan Oil Filter Wrench 420-0577 Fits 122-0836 Fits: HGJAA HGJAB HGJAC and Many others The oil filter wrench can remove the oil filter from 60mm-68mm, and the square drive ratchet can be removed for various types of vehicles. Suitable for: HGJAA HGJAB HGJAC and many other oil filters with a size from 65mm to 68mm The oil filter wrench is a universal tool for removing the filter on the vehicle. Sometimes the filter is very sturdy, and then you need an oil filter to simplify the job The filter wrench is made of alloy steel, low wear, completely anti-rust and anti-corrosion