Looking for replacement part: What to call the locking component?

Macbook Pro 17" A1212

Hello everyone!

I have a quick question - hopefully!

I'm looking to replace the component that keeps the computer locked/closed. My mac book pro from 2006 has survived quite a lot, but the piece that locks the display down, has half broken.

Does anyone have any idea what this is called so that I can look for a replacement part?