The oil filter inspection tool makes it easy for you to monitor the condition of your engine and alert you to possible impending danger. Every time you change your engine oil, you should cut open your oil filter and inspect its contents. This tool allows you to remove the canister from the filter element for easy inspection. Instead of sawing the filter apart, this tool works like a large can opener to separate the canister from the actual filter element without adding any debris to the oil. You will find small amounts of debris when you perform this task. Small specks of aluminum, probably the valve springs rubbing the aluminum cylinder heads, etc., are normal in a new engine. During subsequent inspections you will come to know what is normal, as to the coloration and size of the particles found. If however, your inspection reveals particles that are larger in size or quantity than usual, or have the color of bearing material, your engine is giving you another one of those indicators that something may be failing. This gives you the chance to find out what, before any serious damage can occur. If you want to monitor the condition of your engine even closer, or in the event that you may suspect a possible problem, you could inspect your oil filter between oil changes. After inspecting, just replace with a new filter and add a quart of oil. Oil and oil filters are very inexpensive compared to damaged engine components! This test is easy to perform and takes only minimal time.