[Stainless Steel Ruler Body]The ruler body is made of stainless steel, with precise workmanship, clear scales and comfortable texture. The vertical adjustment knob adopts pure copper knurled nuts, easy to operate. Customers can choose between 200 and 300 sizes, and even have vertical scales on both ends, allowing you to draw precise parallel lines around the edges of your artwork.Minimum precision of 0, 25mmThe minimum precision is 0.25mm, which makes the operation more accurate and reduces errors. The high-precision marker ruler has small holes and slots on each scale, allowing you to mark the width of a line or hair within the range with a pencil The scale is concave and black engraved for easy reading.[Multi-function] - Achieve multiple functions such as horizontal line, vertical line, long line, short line, parallel line, right angle line, etc., to meet your various marking needs. The 90 shape is perfectly positioned and the dual scale surface lets you mark and measure the top, edges and corners at the same time[Suitable for] -Suitable for positioning and marking tenon joints for woodworking. The square is exactly what you need for laying out and measuring around the edge of a wooden board or other piece. The tiny marking holes on each tick mark allow you to immediately locate the pencil tip or precisely track the target without any guesswork or eye strain