Using the Klein 44213 pocket knife is a breeze. To open it, just use one finger to engage the ambidextrous flip lever. The bearing - assisted mechanism will make the blade deploy smoothly. When you're using the knife for cutting or slicing, make sure the frame lock is engaged to keep the blade securely open. After use, close the knife carefully and store it in your pocket using the low - carry pocket clip. As for maintenance, since the blade is sharpenable, you can sharpen it when it gets dull. Keep the knife clean and dry to prevent rust, especially because it's made of stainless steel. Also, be careful when handling the sharp blade to avoid any injuries.