Credit Card-Sized Multitool for Engineers: This laser-cut pocket tool includes a straight-edge ruler, protractor, and compass. From lab work to DIY projects, it's the ultimate at-work companion. Metric or inches? No problem. Draft blueprints, calculate angles, and create precise drawings. Perfect for students, professors, engineers, and mechanics. Surprise your boyfriend, dad, or gadget-loving friends with a unique gift. An ideal stocking stuffer and graduation gift.Packed With Engineering Reference: Never look up a basic engineering equation, physical constant, or unit conversion again. It's not just a ruler; it's your quick-reference tool while on the job. Architects and electricians—slip it into your pocket to save time looking up conversions!For Precision Technical Drawings: Always take a quick measurement or sketch a new design accurately with the ruler, protractor, and compass drawing tools. From construction sites to woodworking, this multitool is your centimeter, millimeter, mils, and inches ruler with angular precision of 5 degrees. A must-have for engineers, architects, machinists, drafters, field engineers, and practical professionals.Never Outgrow It: The reference remains useful throughout a long career. Give a professional, student, or young learner a unique, thoughtful, and practical gift—from homework to cutting-edge research. Ideal for technical students, teachers, and DIY enthusiasts.Lasts for a Lifetime: The laser-etched solid ruler, laser-cut protractor, and laser-engraved reference markings last forever. Whether you're converting inches to millimeters, PSI to Torr, or measuring angles, it's an everyday carry pocket companion for life.Note: Due to different production batches, there may be slight color differences or variances, which do not affect the use. Color: Black Material: Alloy Package Contents: 1 x Metal Engineering Ruler Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. Measurement allowed error is +/- 1-3 cm.