For those who are able to do it, this means that your swing is within the zone. If not, this means that your swing is on the outside and this could have happened before or after impact. This can happen because you are not holding the club properly or your clubface is not aimed properly. Whichever the case, it is best to consult a professional who can analyze the situation and tell you the best course of action.
Should you be able to hit the ball without coming into contact with the box then it is time to remove it and then practice swinging without the aid. If your shots are going outside again, put it back so you can recall how this is done.
There are other golf swings aids aside from the box to help you improve your golf swing and you will have to shell out more than $10 just to use it.
The nice thing about the box is that it won’t hurt your pocket because should this be damaged and have a lot of holes. You can throw it away and then find a box with similar specifications so you can continue practicing your golf swings. One alternative is a soft, long and circular foam that is used as a pool toy.
Speed and hand positioning are important to prevent your golf swing from going outside. Keep in mind that a biomechanically correct golf swing path is not inside out or the opposite. It is also not going down a straight path. It is a movement from inside to inside and once you get it, you will be able to have the correct technique to make this ball fly into the air and land near the hole.