New Swept Boss in Assembly

Hi, I'm new to SolidWorks but have previously used ProE.

I'm trying to add a part in an assembly and can't find the Swept Boss/Base tool anywhere. The help section says its on the feature toolbar but I can't seem to see it anywhere. I don't think I'm doing anything wrong. Can someone help please?

I'm using 2010 premium.

Thanks, Phil.

SolidworksAssemblies