You can get steel balls at the end of a screw from DIN 71802 ball joints:
Here is a picture how does it look:
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And even a non-angular version:
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All these have only 18° angle, but if you connect it to a 3dPrinted plastic ball housing which will contain a cylindrical magnet then you get much better angles and the magnet pole will always be pointing to the centre of the steel ball, i.e. the sticky force will not change with angle.
Here is a picture how does it look:
And even a non-angular version:
All these have only 18° angle, but if you connect it to a 3dPrinted plastic ball housing which will contain a cylindrical magnet then you get much better angles and the magnet pole will always be pointing to the centre of the steel ball, i.e. the sticky force will not change with angle.