Adjustable Lock Angle Measuring Tool Plastic Wooden Marking Protractor Protractor Ruler Measuring Ruler for Carpenter with PencilsFeature:Wide range of applications: for engineering, student drawing, architectural design, woodwork, length measurement, etc. A perfect gift for students, craftsmen, architects and designers. Improve efficiency: The goniometer can accurately and conveniently measure the internal and external angles and transfer them to the processing material. Save time and improve work efficiency. Especially useful during assembly work or furniture construction. It is also used to draw lines parallel to the edges of the fabric. ABS Material & High Precision: The measuring tool is made of durable and stable ABS plastic. Rust-proof, lightweight, compact design and smooth elevator, providing accurate readings. Specification:Material: ABS Size: 340*30mm Usage:1. Place the square square exactly in the corner, aligning the arms.2. We close the corner bars, thus fixing the size.3. Transfer the obtained measurements to the processed material. Note:Due to the different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures. Please allow 1-2cm measuring deviation due to manual measurement.1 X Angle Ruler2 X Pencils