I have 2 styles that I need to apply to elements with SASS:

```
.one {
 max-width: 960px;
 margin: auto;
}
.two {
 max-width: 960px;
 margin: auto;
}
.three {
 max-width: 960px;
 margin: auto;
}

```

How can I do this in a DRY method? I cant see how from the documentarian. 

Variables seem to only pass one rule. Mixins pass multiple but I dont need a variable.  

<http://sass-lang.com/documentation/file.SASS_REFERENCE.html>