Exclusive to: Reign of Giants, Hamlet and Don't Starve Together.
“Oooooooh! I LIKE these.”
“FLAME-TREATED BODY PLATING”
“I still don't believe in dragons.”
“The light refraction is quite extraordinary.”
“They don't weigh much for scales.”
“I need a suit of these, immediately.”
“Hot to the touch!”
“IT STOP'TH FWOOSHINGS”
“What am I supposed to do with some old skin?”
“I prefer fur to scales.”
“Was she a bug or a lizard?”
“Fireproof material has served me well in the past. And future, come to think of it.”
Scales are a rare item in Reign of Giants. They are dropped by the Summer Giant, Dragonfly. Scales are used to craft fire-resistant items: the Scalemail, which grants wearer immunity to fire damage, and the fire-proof container, the Scaled Chest.
Scales are also included in the Hamlet DLC, however, the Dragonfly is not present. Instead, Scales can be bought for 30 Oincs at 'The Sty' Oddities Emporium in the Pig City.
Don't Starve Together
In Don't Starve Together, Scales can be used to craft Scaled Flooring and the Scaled Furnace. The flooring limits the rate that fire spreads to objects placed on it, while the furnace is an infinite light and heat source similar to Magma.