Fits Ryobi 40v Brushless 16 in. Weedwacker
By some freak algorithm I see a Ring doorbell screwdriver next to a T15 Torx screwdriver on Amazon while searching for a T15 Torx screwdriver which, by the way, I was prepared to pay for! Sure enough I had one of those blue things around and it did indeed fit the Ryobi. Unfortunately, tightening the screws did not fix the problem. Fortunately, the problem is more of a concern at this point, just some play around the rod is all, not a big deal.