Hi! My name is Matthew Christian from Tampa, Florida and on behalf of Expert Village, today I would like to talk to you about the proper use and maintenance of a yard weed eater. Now as I mentioned earlier, this particular model is interchangeable and what I mean by that is this currently has the weed eater attachment on it. Well rather than having to go out and buy separate machine, entire unit, to do my edging, this unit is interchangeable and I can take the weed eater attachment off by loosening the clamp. Then there is a spring loaded set pin that I will press in and that allows me to remove the attachment. Quite simply, just insert the other attachment that I am looking to use. Slide it in, wait till the pin locks or pops out through the hole and then tighten the clamp again. Now it is ready to be used as an edger. Most models like this that have interchangeable ends come with other ends that you can use other than a weed eater or edger. Some models come with a hedge trimmer. Also I've seen a miniature leaf blower attachment for some of them so they really can be a great tool, universal rather than having to buy different machines for different applications. It's one tool that does it all.