Can anyone offer help with adding nubs to a cylindrical surface

Hello,

I am trying to draw an anvil with small numbs around the edge. I have drawn a circle and extruded this to give the correct base shape for the roller, however I can not seem to add little numbs around the cylindrical surface of it. I have attatched what I have, and roughly what I aim to have at the end. (nonub and nub respectively) allthough i do nopt require the detail shown in my example of the latter

Thank you for your help

Mark

SolidworksAssemblies