A pretty simple pivoting angle grinder bracket to allow you to cut straight / threaded rod. Produced in SCAD so you can easily change it to suit your angle grinder. STL files included if you happen to have a 115mm grinder that looks about the same diameter as mine (I think they are pretty standard).
This was printed in ABS with a 0.3mm layer height. The flexibility in the ABS is not ideal but it's okay, if I printed another it would be in PLA.
It had to be built with Reprap parts I had lying around.
The pivot screw is 8x60mm (hobbed bolt!) with some mudguard washers either side for stability, the collar screws are 4mm.