Using this Makita multi - cutter blade set is easy. First, make sure you have the Makita 12V max CXT™ multi - cutter (model PC01Z). Insert the blade set using the included lock pin. It will slide in smoothly and lock firmly in place. When using it, start with slow cuts on your material like cardboard or carpet to get a feel for the tool. You can then increase the speed for more efficient cutting. As for maintenance, after each use, wipe the blades clean with a dry cloth to remove any debris. Store the blade set in a dry place to prevent rust. Be careful when handling the blades as they are sharp. If you notice the blades are dull after a long time of use, it might be time to replace the blade set for continued good performance.