this is an inexpensive ways to make your own dotting tool. they work exactly the same as professional tools and they are also very easy to make.
1
you will simply need 2 things a pencil with an eraser and a straight pin. the top of the pin can be any size you want.
2
now simply insert the pin into the middle of the eraser. is it comes out a little crooked it's fine because you can easily fix i,t then you are done.
3
this is what the dots will look like. there is really no difference and you save money.