Portable Precision Engineering Tool: Carry a compact stainless steel multi-tool that fits in your wallet. This credit card-sized gadget features a ruler, protractor, and compass for accurate measurements and drafting on the go. Ideal for students, engineers, and DIY enthusiasts seeking convenience and precision in their projects. Comprehensive Engineering Reference: Access essential engineering equations, physical constants, and unit conversions at your fingertips. This pocket tool goes beyond a ruler, serving as a quick reference guide for architects, carpenters, and electricians. Save time on calculations and conversions with this versatile companion for professionals and hobbyists alike. Versatile Technical Drawing Companion: Empower your creativity with this stainless steel ruler equipped with protractor and compass tools. Achieve precise measurements and angular accuracy from construction sites to woodworking projects. A must-have for engineers, architects, machinists, draftsmen, and anyone who values accuracy in their designs. Durable Lasers-Etched Design: Crafted from solid stainless steel, this multi-tool ensures longevity with lasers-etched ruler markings, cut protractor edges, and engraved reference information. Whether you're working in inches or millimeters, this durable companion withstands daily use for a lifetime of reliable performance. Practical Everyday Essential: Lasers etched solid stainless steel ruler, lasers cut protractor, lasers engraved reference information lasts forever. Whether you're converting inches to millimeters, PSI to torrs, or measuring angles, it's the pocket companion you'll carry every day of your life. Essential for engineers and engineers converting between English and Metric systems! Surprise your engineering staff, manufacturing team or quality control staff! Item Name: Engineering Ruler Material: Iron Features: Precision Engineering Tool, Engineering Reference, Lasers-Etched Design Size Details: L: 8.5cm/3.35", W: 5.4cm/2.13", H: 0.5cm/0.2" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Engineering Ruler