I think it depends on the material. I've tried to have a pair stretched out in the toe, and they're made of a very thick leather. The cobbler tried twice, and I can just barely notice a difference, but not much. I'm sure that if the material were softer and thinner, that it would have been more successful. Anyway, it did seem that they were able to target a specific spot, if that is more your meaning. Definitely take them in and give it a shot!