Don't understand your question. Do you want to stencil a rolling pin or apply something using a rolling pin?
I think what you're looking for are called rolling pin cookie stamps. They would work on anything though and it would be fun to roll them in paint to stencil a wall maybe?
To add on to what others have said, I've seen people buy rolling pins from the dollar store and use foam sheets to cut out a design and stick it to the rolling pin. You could cut the design freehand or use a machine like a Cricut or a Bigshot to cut out different patterns. Then stick your foam to the rolling pin.
Hi Lin, they do sell paint rollers with stencils on them. They are made specifically for that purpose and will hold and distribute the paint properly. Different companies sell different patterns. Here's what I mean. https://www.youtube.com/watch?v=E-kg3QIEarQ
Here are a set with 8 different designs that you can buy!