Iron in the concrete wall?

[Dowser4711]

Have you tried using a metal drill yet?

 

[anders07]

Might have to make another purchase of one of those rotary hammers! Any suggestions on brand/model?

Any rotary hammer with an SDS chuck is likely to be better than the one you have.
Depends a bit on how much you want to spend and if you will benefit from it later.

You should expect to pay around 1000kr and up for a decent machine. I would go for at least 600W.

Biltema and Jula have quite good rotary hammers, but AEG, Metabo, Makita are slightly better and might be worth investing in.