I don't think I have ever seen a trimmer that takes a blower attachment. I have seen powerheads that take trimmer, dethacher, tiller, sweeper, and maybe a few others, but not a blower. For just blowing grass around after mowing, almost anything should work. An electric will probably be simplest and have enough power to do the job.

It will work fine. These are clink-link attachments for the machine formerally known as Ryobi (not the current Ryobi) but now made by MTD and branded as Craftsman, Troybilt, Cub Cadet and others. 2 stroke, 31cc, half crank, spark plug on the bottom.

I had not seen a blower attachment for a trimmer powerhead before. The good thing about it being from Sears is that you will likely be able to return it if it does not work. Given the size of the unit I am not sure how well it will work. Also for the $56 they want for it, you could get a dedicated electric blower/vac. I am pretty sure it would have more capability than that powerhead attachment, but I could be wrong.