Can someone tell me what this is?

Shtukka

What's the name of this clip thing on my handlebar, and more to the point... where can I buy a replacement?

One is all chipped, the other's come off.

Edit - apologies, forgot the pic!

thefd

Shimano Name Plate

arran77

That's a name plate.....

http://www.behindthebikeshed.co.uk/newsearchres.aspx?categoryid=291&imanuid=6

Shtukka

Magic, thanks Fd and arran.