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Drawing a line with a conventional ruler is inaccurate when you are looking from the side. Well, Pro Ruler has micro-fine marking holes that lets you mark your measurement accurately.
Marking precise points is just that simple with Pro Ruler. Its unique design makes it very easy and convenient for you.
Select the proper slits or tiny holes, insert a mechanical pencil and mark the measurement instantly with dead-on accuracy.
It has small holes on it, so you don't have to mark your points at the side of the ruler, which causes inaccurate marking.
Pro Ruler has super precise scale on it. It can be as fine as 0.25mm, making the operation more accurate.
The Right Angle Ruler's two-scale surfaces let you mark and measure on the top, edge, and corners simultaneously!