# Nameless metal tile as an SMT resistor?

I've encountered this resistor R12 while trying to understand how a board is working. It seems to be much bigger than the other SMT components and basically just looks like a flat metal tile without symbols.

Do these kind of resistors have a specific name, or present a certain best practice for appliances?

My assumption is that this might be a dedicated shunt for a higher current, but the lack of any symbols got me confused.

Update to provide more context

The device being examined is a socket extension that can measure the current going through the mains. Besides this resistor, the component I wasn't able to identify was this little guy:

• Check if it has a "current through" path and two smaller measurement traces, then its for sure a shunt. – PlasmaHH Dec 13 '16 at 16:20
• Maybe it's installed upside-down? – pjc50 Dec 13 '16 at 16:31
• It's a medium-long shot, but some laser trimmed resistors looks similar and have no markings on them. Is it a high end product of some sort? Ah! Just saw your edit. I vote for precision laser trimmed resistor! – winny Dec 13 '16 at 16:33