GREAT VALUE
I needed three of these knob assemblies, so I checked several web sites and this one added only pennies to each extra item on the shipping cost.
Between the cost of each item and the combined shipping this turned out to be a great deal.
Terry's comes highly recommended.

Ryobi Bump Knob Assy
This is exactly what I was looking for and I could not find it locally. Item fit on my string trimmer and everything works well. Fast shipping and a good price, couldn't ask for anything more. Since they do wear out rather quickly I will probably order a couple more.

Knobby, bumpy, kneat-oh
Works great with the weed whacker.
The button on the end wears out too soon, being hollow.
Take a 3/4" wooden dowel and shove that in there and it'll last for years.

Perfect Fit
This was a perfect fit and was shipped out so fast.
Thank you,

Only on Amazon!
I have searched for this part for several months and was informed by everyone that it was no longer available.
Only on Amazon was I able to find exactly what I needed without having to purchase another 'newer' model.
Thanks Amazon for again finding parts and everything else I want! I honestly believe that if I cannot find it on Amazon, then it cannot be found!