About Jack Hammers
Jack hammers are very useful in construction projects because of their portability. Most of the times they are used for drilling rocky surfaces or breaking paved surfaces. They are powered by compressed air which gives in return repetitive jabbing operations.
The limits of these tools
Jack hammers perform very well on flat surfaces because they depend very much on the thrust from the body of the user. This is why it won’t work so well on walls or inclined surfaces. If there is no chance and you really have to use it on such surfaces, the help of someone would be very useful. This way one will operate the tool and the other will direct the bit. It will require hard work but the results can be the ones that you want.