- Multifunctional drawing ruler set with options for tube rounding and right angles, enabling precise lines without the need to cut materials. Suitable for all design enthusiasts who value accuracy and efficiency. - Flexible size options: two adjustable ranges - 20-65 mm and 20-80 mm - to accommodate different tube dimensions across various projects. - Two-way functionality: the smart design allows drawing from both the front and the back of the ruler, enhancing workflow efficiency by offering multiple perspectives for each task. - Precise angle creation: equipped with two 45-degree angle guides to facilitate complex designs with professional accuracy every time. Applications and use scenarios - Metalworking, woodworking, and plumbing projects that require rounded tube joints or precise right angle layouts without cutting materials. - Design and drafting tasks where quick, accurate layout of varying tube dimensions is needed, including prototype and mockup work. - Furniture framing, frame assembly, or conduit installation where consistent 45-degree joints and clean, mark-ready guidance improve speed and accuracy.