I do not know how many times I have had to buy a cake last minute and there was no one around to write on the cake for me at the bakery. I finally gave up on waiting around while I was in a rush for someone to help me that I decided to purchase a set of these writing tips. If you have never used them before and you have no experience with cake decorating I am going to be honest and go ahead and say that these were very difficult for me to get used to. The holes may look small but they really aren't. I suggest playing with every size so you can get an idea of how they will look and what size the lines are that will becoming out. I do not recommend just going with what you will think because chances are it will not be what you expected it to be at all. You do need to apply quite a bit of pressure to the icing that's going out of it. I have no idea why it is difficult. These work excellent in a pinch though and are easy to get used to if you know the right sizes you need.