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The problem is solved in a different way. I did try to drill through it. Using a hard-metal center point did indeed give a good dimple / pit to start drilling. However, the drilling was no succes, the material was simply too hard. In the end I tried to remove the wall bracket by means of a...

Drilling around the discs is not any easier, as the plate in which they sit is also from hardened steel. I can see the tip on welding something onto the disc and then pulling out can work, but I don't have any welding experience/equipment.

To add one more thing: it is not a steel plate but a 5mm thick coin shaped disc. The object I want to remove is a metal mount screwed onto a wall, and to protect direct access to the screws these discs are fixed / inserted in the metal plate just on top of these screws (plate has holes in it for...

I do not have an arc welder or gas burner. I am not a professional metal worker, just a DIYer. I prefer to make a few serious attempts in solving this problem myself before I call in help from a professional. I don't mind buying some good special drills - they will always come in handy - but...

Thanks everyone for the tips. Some extra information that might help to focus any new tips: - A drill press is not possible as it is quite a small object without enough metal space around it to magnetically fix a press onto. - I could indeed try to push all my weight on the drill. So far...

I need to drill a hole of a few mm through a piece of hardened steel being around 5mm thick. The workpiece is mounted on a wall, so I do not have the option of putting it under a stationary column drill. Searching the internet left me with the following advice: use a extra hard drill bit...