STAINLESS STEEL RULER BODY- The ruler is made of stainless steel with precision manufacturing, clear scale, CNC machining, and comfortable texture. The vertical adjustment knob uses pure copper knurled nuts for ease of use. There are sizes of 400 mm. There are even two vertical end scales to draw precision parallel lines relative to the edge of your work. 0.25MM MINIMUM ACCURACY- The 0.25mm minimum accuracy makes the operation more accurate and reduces error. The ultra-precise marking ruler has tiny holes and slots at each graduation, allowing you to make a dot with a pencil or mark a line precisely within the width of a hair! The scale, being recessed and engraved in black, is easy to read. CLEAR ENGRAVING- Clear and accurate laser engraving scales. The imported 0.5mm pencil makes the line smoother, the on...