3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: !functionalprint@kbin.social or !functionalprint@fedia.io
There are CAD communities available at: !cad@lemmy.world or !freecad@lemmy.ml
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I bet these would also work in masonry
They expand quite a bit and the little tabs are intended to dig into the drywall to keep the assembly from rotating while it the screw is set.
I suppose you could cut the little tabs off and not use the ring and it would still work. It may be problematic since the main anchor bit is split in half.