I have a broken spark plug in my weedeater and need to know how to change it. There is a hex type of bolt that needs to be unscrewed (it looks like) and wanting to know if a specific wrench can be purchased for this.

Regular spark plug wrench... OR buy spark plug sockets to use on a ratchet. Either way works. OR vise grips... but that's not recommended, the plastic would have to be cut away to get to it. (which these darn things are put in tight, very tight)