What are these?

[Diyisfun]

Some sort of fixing I guess, how do you use them

 

[JohnD]

http://www.diy.com/departments/bq-metal-projecting-anchor-bolt-pack-of-4/254246_BQ.prd

 

[noseall]

Sleeve anchors.

 

[Diyisfun]

Thanks fella's they came with an item that I had to assemble & I thought they were part of that.
So I didn't need these as I had made a secure fixing to timber.

 

[noseall]

So I didn't need these as I had made a secure fixing to timber.

Yes, those are for drilling into masonry or concrete.