The Leifheit Safety operates with a special Leifheit safety technology that ensures injury-proof and blunt edges for every can. Here's how it works: place the Safety can opener on the can, position the lid edge between the wheels, squeeze, and then turn it gently and effortlessly. The Safety cuts the lid from the side instead of from the top, allowing it to be easily reattached for sealing. The Leifheit Safety is suitable for both right-handed and left-handed users and can be used safely even with wet hands. It also includes a bottle cap opener and a vacuum jar opener.