Professional carpenter's tools: carpenter's tool set with metal ruler, for woodworkingThe square metal carpenter's ruler is precisely graduated on both sides and has a hidden stainless steel drawing tool at its end which can be used as a drawing tool, a protractor, a plotter, a saw guide and a triangular board. High Quality Material: The triangular board is made of high quality aluminum alloy, with matte black surface to avoid glare and improve resistance to oxidation. There are no sharp edges, which makes it safe and durable.Extension arm: The folding triangle is equipped with an extension design, which can be freely adjusted to 6 or 12 inches, increasing the distance to measure and fully meet your needs. Built-in strong magnet, fixed extension arm, easy to open, not easy to fall, easy to bend, can reduce storage space, easy to carry.Adjustable positioning: when using the triangular ruler, carpenter's angle , you can freely adjust the angle, after adjusting the angle you want, tighten the positioning nut and press the middle adjustable support bar to achieve precise positioning. The multi-functional carpenter's ruler offers a variety of measuring methods for different occasions. The perfect gift: This square carpenter's measuring and drawing set is a wonderful gift set of woodworking tools that is not missing in any box. tools, the perfect gift for professionals, architects, DIY enthusiasts. Note: The data are all manual measurement, please allow 1-3cm error, due to the difference in light and display, there will be some color difference, depending on the physical item received.