See what is inside your oil or fuel filter. This tool should be in every mechanics toolbox to facilitate the diagnostics of repair, maintenance and performance on any engine. Don't try to open the canisters with a hacksaw or wire cutters. If you can get an oil filter strap or wrench on a filter you can use this cutter to open it. Oil filter cutter tool compliments any engine oil flush. Please note! If the top bar gets knocked out of allignment, it can be adjusted by loosening and tightening the two allen bolts on the back.