This seven string set of Ernie Ball are made in the USA and are used by many famous or infmous guitar-playes, today they are still my favourite brand of guitar strings as they are not very expensive, but last a long time and also stay in tune for a long time.
The sounds i bright, with a thight and controlled bottom end that makes your guitars shine and get all the presence you need to be upfront and get the focus on it. Especially for Rock and Metal Music, where you want your guitars with lots of bite and and presence, there is nothing worser then a set of dead and dul sounding strings, to avoid this, you should try out those strings