What is a Spirit level?

The outside of the spirit level is made of

A spirit level is used when laying

Can a spirit level tell you if a post is standing upright or not?

The spirit is in a glass

How can you tell if the long tool is level or not?

Which word means 'closed tightly'?

'a spirit level is a tool used by bricklayers ' what punctuation marks are missing?

Which word means 'to lean'?