This design was intended to allow for an existing towel rail fitting to support a heated towel rail. It may need scaling to fix various setups.
I also used 4x M4 copper set nuts with 4x M4 screws and 8x M2 copper set nuts with 8x M2 screws to secure the bracket to the existing fitting and the heated towel rail, respectively.
The author marked this model as their own original creation.