The Victorinox Alox Farmer is a slipjoint knife. This means the blade and the tools are held open only by the spring tension of it’s back springs. There are no additional safeties. One way to tell a good slipjoint knife is simply by opening and closing the blade and listening to the sound it makes. If you can hear a nice „snap“ it is most likely a well made knife with properly hardened and adjusted springs. This guarantees longevity and safety when using. Now enjoy the music this Alox Farmer makes:
PS: If you do not own a Swiss Army Knife yet, go and buy an Alox Farmer, it will serve you a lifetime!