I do not know if these tools will fit everything, but they do fit my lawn & garden products.

I have an old Ryobi Blower and Trimmer both were bogging down and stalling when I would give them gas. They were on their way to the curb simply because they were not worth sending for repairs, I had already cleaned the carbs and replaced the Fuel lines, primer bulb and fuel filters. Well a little research and a quick search on amazon and less than 48 hours later they are running better than than new using the "Double D" (Trimmer) and "Pac-Man" (Blower) drivers. It took some fiddling with the Low speed setting and I overshot and thought I really had messed up so take your time and only turn quarter turns and give the motor time to adjust before you turn it more. Once you pass the "sweet spot" you will know and slowly back up until she purrs. Great set and the added case is a real plus so now I can just toss it in my small engine tool bag and always have it with me. I will never not own these tools as long as I am willing to repair on my own.

This tools look very good considering the low cost of the set. It would be great if it would have included information matching each tool to a respective 2 cycle equipment manufacturer, I'm still giving it 5 stars.