A scale
A protractor is used to measure angles.
It's a grade B steel alloy , used for tool making i believe.
In some grading systems, it would be, but there are many grading systems used where it would be a different grade.
There are many tools used in Plastering, though the primary tool would be the Trowel.
A item which is used on a regular basis. For example, a hammer would be a common tool for a builder.
Basically the tool would be used for someone to cut and harvest the crops when they are ripe.
A punch down tool is used for inserting wire insulation-displacement connectors on a punch down tool. It is a small hand tool that is used by network and telecommunications technicians.
I would say the average grade of oil used in a Duramax is 15W40
A balance is the best tool for measuring mass.
Microscope
A protract is a tool used in math class. You generally start learning how to use it in 5th grade. A protractor is used to measure the angle between two lines that intersect.
The tool that a person would use to measure out a pound is called a scale. A scale can be used to weigh people as well. Pounds are a form of measure used on the Imperial system.