Insight hd cable, need to open case? What type of screw is this?

[kentucky7887]

So insight would not let me return my cable box, so I had to buy it. I want to open the case and remove the hdd but don't know what type of screw this is or where to buy the bit to remove it.

http/www.flickr.com/photos/ismaili/8323217739/in/photostream

sorry for a link but I'm not sure how to make the pic appear in the post.

 

[kentucky7887]

I'm surprised that no one knows what this is. I kinda wanted to keep the case intact so that I could reuse it for a HTPC, but I guess I'll be taking a dremel blade to it soon.