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The files for this object have been removed as protest to Stratasys suing Afinia.
Print out both parts. I suggest 100% fill since you'll be banging this on the ground and the top part will wear down.
You'll need the bolt and washer from the existing/old knob. Put the bolt into the bottom part and make sure it can slide up and down easily (see picture). Make sure the bottom part can also slide up and down the tapped shaft on the trimmer head. Glue the top part on and screw into place on your trimmer using the old washer.
Now go make that lawn look tidy.
Bump Knob for Craftsman Trimmer (316.798221) by restifo is licensed under the Creative Commons - Attribution - Share Alike license.
So what's this mean?
We're sure restifo would love to see what you've printed - take a photo and share it on Thingiverse as a Make.
To post a Make simply visit this Thing again and click I Made One to start uploading your photo. You can also download the Thingiverse Mobile app (available via Google Play and Apple App Store) to take a photo and upload your Make right from the app!