His sister Iris says that Froilán Cruz Núñez is a source of pride for his family and many reasons: his perseverance, ethics, and uprightness in life. But it is not only his family that has this opinion, because his clients see him as someone who can be trusted, in a profession in which the locksmith always has the key, with all that this may entail.

In addition, for him, "the locksmith is the most honest and responsible person in a town, incorruptible by the way."

"They have come to my workshop to ask me to make them a key that they bring traced on soap, modeling clay, or paper, but no way, they don't take me for that. I have never accepted it and they have offered me a good amount of money."

A locksmith is not just anyone, even if he can make a key. Honesty and responsibility are the golden rules of this trade to which Froilán has dedicated more than 40 years. During which he counts the astronomical figure of some 500 thousand keys made by his artisan's hands, and that memory that allows him to know even the sound of one of these mechanisms, to disassemble, to assemble, and to determine where each piece goes.

The invention of the lock is attributed to the Chinese and the Egyptians and was later used by the Assyrians and the Greeks. It is therefore one of the oldest forms of security engineering. It is a craft, an art, generally learned by inheritance and passed down from person to person while other skills are acquired empirically.

"No, I have no locksmith heritage in my family. I trained because I found it impressive, mysterious, and, above all, difficult, and since I like challenges, and high goals, I set my mind to it, and look, it's been 40 years now, which is no small feat."

"My greatest satisfaction is to open a safe closed for any reason. There you have to be very careful, because that is a very specialized technique and very difficult to learn, and you have to practice a lot. You feel an indescribable joy when you manage to open one of these mechanisms."

Locksmiths have the responsibility of the population's resources in their hands, hence the honesty that must prevail, the responsibility, because people trust them, a maxim of this kind and polite, helpful man.

Froilán is worried that the locksmith will disappear with time because there are fewer and fewer people dedicated to these tasks, and that is why he has created his school. There, in his small workshop next to the Gustavo Aldereguía polyclinic, in the city of Las Tunas, where every day his hands of craftsmen, and artists, give enormous satisfaction to those who have lost a key or have problems with a lock or a keyhole, those small instruments that give people peace of mind.