Yes, LATTENS is a Scrabble word!

Letter values in Scrabble US: L 1, A 1, T 1, T 1, E 1, N 1, S 1.

Is it a valid word?

LATTENS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

brass (or a yellow alloy resembling brass) that was hammered into thin sheets; formerly used for church utensils