While I am not giving this 3 stars for being the wrong part, I am giving it 3 stars as even if it were the right part this is a cheap not so great part. Problem 1: EGO does not clearly illustrate which trimmers their parts work with. You might say but, it says works with this model? And that is true, but, the trimmers don't all have that model, and some have unique odd models that aren't listed for any of their parts. Note: in my research this looked like one that would work with the ST1502, it does not. Problem 2: The part is cheap, worth $10 tops, its doesn't have any great features, winding it is a pain, and it fits my trimmer but, really doesn't work as the depth for the nut isn't deep enough for the locking portion to work, so it spins itself off as the nut cannot lock on the wax lock like it's supposed to, if you tighten if far enough to lock, its so tight it doesn't spin and while this is heavily due to it not being the right part, it's almost exactly a fit, and yet, barely doesn't work. Plus it's cheap so don't recommend this to anyone. I would go as far as to say, if you buy EGO, be wary, while it's a great quality tool, their support sucks, I reached out to them and have heard nothing back about which part should work for my trimmer, and it would appear that my trimmer at three years old doesn't have a replacement part available, which isn't great for a tool company as I should be able to get parts for several years. Especially a basic part like a trimmer head. Don't recommend EGO to anyone who wants access to parts for more than a few years, and to anyone who expects them to actually respond to support requests. Which is sad because I do like the tools and the build quality.
