Before I forget to mention those pole saws/ weed wackers will also take a little tiny tiller head like a Mantis tiller .Sears sells them and others .They come up on flea bay also .
I've never used the weed wacker on mind due to the fact I already have at least a half dozen hanging in the shed. McCulloch,Ryobi ,Stihl ,Echo and some I forgot the names of .These things are like old chainsaws .About the first time they don't start people give them away .6 dollar carb kit most of the time .