Using this Outdoor Edge Razorlite knife is a breeze. To change the blade, just push the button. This makes it quick and safe. When opening the knife, use the double - sided thumb stud for one - hand operation. It's really handy. Remember, the replacement packs of 6 blades are sold separately, so keep that in mind if you need more blades. As for maintenance, keep the knife dry to prevent rust, especially since it has a rubberized grip. If it gets wet, dry it thoroughly. Also, you can clean the blade with a mild soap and water, and then dry it well. With proper use and care, this knife will serve you for a long time.