What is this metal object in lintel?

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bxjzhzdip

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I'm trying to install curtains (for the first time) and am having problems drilling into the wall.

I'm drilling about 9cm above and 4cm to the side of a recessed window. I'm hitting this round metal object about 3cm into the wall. I can't drill further properly because the drill bit slips away. What could this be? Also, what's the blue (I think metal) sheet behind? Is that the lintel?

I've successfully drilled 3 other holes around this window (1 right below as shown in the photos). As far as I can tell, there's about ~3cm of drywall, then a ~0.5cm hard material (lintel?) that I drilled through using a hss bit, then about ~3cm of hollow space, then some other material (lintel?). The window is about 25cm deep from the wall face. This is a recently built flat.

Any help would be appreciated!
 
Last edited:
motorbiking said:
It looks like you may be hitting the steel bolt for the building frame. Why not use a plasterboard fixing?



your other option would be to use a batten
Click to expand...

I can't drill deep enough because that thing is 3cm in.
 
Last edited by a moderator:
The fitting in the link is 35mm they also do some in 32mm if you've managed to drill the tip of the lintel it will work. Otherwise its pink grip + batten or specialist fittings.
 
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