All retractable leashes retract nicely, that is, until you press the lock button. The problem is that, once locked, the strap doesn't retract, and when the distance between you and your dog is decreased, it sags. And that sucks!

In an instant, a technological device becomes a simple piece of rope, reminiscent of the scene in “Cinderella” where the carriage reverts to a pumpkin. You press the button: the lock is On – retraction is Off. You let it go: retraction is On – the lock is Off.

The two most important functions – the retraction and locking of the strap – can’t work together and ultimately eliminate each other. As a result, it’s a constant battle to find a balance between the two. You have to keep pressing and releasing the lock button. On just one walk with your dog, it could happen hundreds of times, and within a dog’s life – about a million times!

As a retractable leash user, you should be familiar with the problems that a sagging leash causes: it constantly gets tangled in your legs and the legs of your dog, clings to various obstacles, gets dirty and gets wet in puddles. And it's annoying!

Besides inconveniencing a dog owner, a sagging leash is a cause of danger for all around – since it gives the dog freedom to act on its own. When this happens, your dog can become unpredictable and bite a stranger. Be careful though, one day your doggie could lead you on its sagging leash right into the courtroom.

Did you know as a retractable leash user, you could be injured, too? Typically, in an emergency, people – out of habit, press the lock button and run towards their pet – the strap sags, and then they grab it with their bare hands in an attempt to pull their dog away from danger. The strap will cut and burn your fingers, and can inflict more severe injuries. Who wants to risk losing a finger?

Your dog, too, might get tangled in the strap and get hurt. Who wants to pay for expensive Vet bills?

Also, a “wimpy”, sagging leash will have a negative effect on your dog. After locking, when the distance between you and your dog is reduced, there is always a natural delay before you let the lock button go, and the strap will always sag. As a result, during sharp retraction, the strap yanks the dog’s collar. Considering the regularity of such jerks, you can imagine how annoying it is to the animal. If dogs could talk, they would tell us how much they hate when we jerk their collars. You want your dog to love you, and not hate you, right?

As you can see, the product name “Retractable leash” is not totally accurate – during half of their operational time they are actually NON-retractable.

But there's more to Petronic that makes it one of a kind.

Now, this next part might sound too technical. However, we have to explain how a regular leash is designed, and how Petronic works.

Let’s take a closer look at the locking system. Almost all retractable leashes have a fixator which can hold the lock button in the pressed position. Yet, when you use it, the sagging of the strap poses even more problems – the lock button stops working and you can’t use the leash normally. Now, in order to stop your dog, you have to reactivate the lock button by releasing the fixator, let the sagged strap retract to regain tension, and press the lock button again! This often happens too late in an emergency situation.

For this reason, manufacturers restrict the functionality of the lock fixator by allowing it to be used only to lead a dog on the shortest leash at the foot.

The independent functioning of two separate locks transforms Petronic into some kind of nesting doll, where inside one retractable leash there are many others: of any length at your request and with full functionality.

To illustrate the superiority of Petronic, let’s look at an everyday situation with dog owners. You are walking your dog with an ordinary “old school” retractable leash near the roadway. It would be quite convenient to set the long-term lock of the leash to the distance of the roadway. Except, you can’t do this. During the struggle with the sagging strap be ready to use your thumb: your dog approaches the roadway – you press the button, your dog stops – you release the button, your dog runs towards the street – you press the button, and the same thing happens – you do it again, and again.

Furthermore, you must keep a constant eye on your dog, as you can't afford to miss the moment when your dog approaches a danger zone. Forget about surfing the web or texting on your phone! Instead of enjoying a leisurely walk, you find yourself quite occupied, both physically and mentally.

In the same situation but using a Petronic leash, you only need to set the leash at the desired length once, while the strap always remains tight and the lock button stays active.

To grasp the difference between Petronic and any other retractable leash, you could draw a parallel with cars with standard and automatic transmission. Which one do you prefer to drive?