Using this Outdoor Edge Razlite knife is a breeze. To open it, simply use the double - sided thumb stud with one hand. When the blade gets dull, just press the button to safely and easily swap it with a new one. Make sure to keep the replacement blades in a safe place as they are sharp. For maintenance, after each use, clean the knife with a dry cloth. If it gets wet, dry it thoroughly to prevent rust. The Grivory® handle and pocket clip are durable, but avoid excessive force on them. And remember, replacement packs of 6 blades are sold separately, so you might want to stock up in advance.