I am looking for a font with connected holes like this for my vinyl printing project:

But what is this type of font called?

I am looking for a font with connected holes like this for my vinyl printing project:

But what is this type of font called?

EDIT

With PieBie answer, I found plenty of stencil fonts and I made some tests with my Vinyl Cutter (Graphtec CE7000) and I was disappointed because it is quite difficult to remove the liner without removing some of the letters.

I noticed letters such as C, K or E don't need any cut. Only letters with true holes need a cut such as A, O, D... I would appreciate any complement to the answers.

To save some time, I am looking for a font with connected holes like this :

But obviously I don't know how to name this kind of font. Any help?

I am looking for a font with connected holes like this for my vinyl printing project:

But what is this type of font called?