The verbs "be" + "make" can indicate where, how, when, and of what material something is created. It’s extremely useful when describing the production of things.
A: What is this vase made of?
B: It’s made of clay.
A: Where was it made?
B: It was made in Mexico.
A: What is this guitar made of?
B: It’s made of wood.
A: Where was it made?
B: It was made in Korea.
A: What are these wrenches made of?
B: They’re made of steel.
This comb is made of plastic.
It’s a plastic comb.
A: When was this lamp made?
B: It’s not old. It was made just a few years ago, but it looks like it was made a long time ago.
A: When were these spring rolls made?
B: They were made just an hour ago.
A: Where was this toy made?
B: It was made in China.
A: Where was this bike made?
B: The parts were made in China, but her father put it together.
A: How was this mask made?
B: It was made by hand. Someone carved it out of a piece of wood.
(be) made by hand =
A: How was this chair made?
B: It was made by hand. It wasn’t made in a factory.
