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When you want to stock larger sizes, do not need to carry a tape measure. When you want to make a picture frame, there are many times necessary to put the nail again. This tool is object's size, angle, and horizontal applications the tools to know.

[Length]
The size of the cards with cash or other object can be seen the length of the horizontal and vertical.

[Angle]
Move the two lines, you can see the angle of the object visible.

[Horizontal]
A horizontal line marking the object is confirmed by the view camera is available.

You cut a useful application in real life Try a lot.