This spell can unlock doors and windows, it was also able to unlock doors which were locked with the locking charm.

For example Hermione used this charm in her first year at Hogwarts to unlock a forbidden entrance in the third floor.

Hello, my witches, wizards and muggles, that was the chapter for today!
I wish you all a merry Christmas!🎄❄️❤️
I hope you liked it and we'll read us again next week!
Your Mine!