--- product_id: 464877332 title: "The Pocket Engineer - Wallet Engineering Ruler Scale and Unit Conversion Reference 3 inch" brand: "genius lab gear" price: "€ 35.69" currency: EUR in_stock: true reviews_count: 6 category: "Genius Lab Gear" url: https://www.desertcart.at/products/464877332-the-pocket-engineer-wallet-engineering-ruler-scale-and-unit-conversion store_origin: AT region: Austria --- # 3-inch stainless steel ruler Protractor & angle drawing tools 10 physical constants & 7 equations The Pocket Engineer - Wallet Engineering Ruler Scale and Unit Conversion Reference 3 inch **Brand:** genius lab gear **Price:** € 35.69 **Availability:** ✅ In Stock ## Summary > 🛠️ Pocket power for engineers on the move—measure, convert, create, repeat! ## Quick Answers - **What is this?** The Pocket Engineer - Wallet Engineering Ruler Scale and Unit Conversion Reference 3 inch by genius lab gear - **How much does it cost?** € 35.69 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/464877332-the-pocket-engineer-wallet-engineering-ruler-scale-and-unit-conversion) ## Best For - genius lab gear enthusiasts ## Why This Product - Trusted genius lab gear brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Wallet-Ready Precision:** Fits perfectly in your credit card slot for stealthy, everyday carry—always be ready to measure or convert on the go. - • **Exclusive Bonus Content:** Scan the QR code for monthly updates, bonus engineering content, and special discounts—stay ahead in your field with insider perks. - • **Multi-Functional Design:** Includes photogrammetric scale calibration, fractional inch conversions, pipe diameter measurements, and a 5-degree resolution protractor—all in one sleek tool. - • **Built to Last a Lifetime:** 0.5 mm thick laser-cut stainless steel with enamel coating ensures durability that outperforms plastic and ink-printed rulers. - • **Instant Engineering Reference:** Packed with essential physical constants, unit conversions, and quick-reference formulas to keep you sharp without reaching for your phone. ## Overview The Pocket Engineer is a TSA-compliant, 3-inch stainless steel engineering ruler designed to fit in your wallet. It combines precision measurement tools, essential engineering constants, and unit conversions in a durable, enamel-coated metal card. Perfect for professionals, students, and makers, it offers a lifetime of reliable use and exclusive monthly content via QR code. ## Description Every Day Carry (EDC) gear for passionate engineers.Tech enthusiasts, engineers, mechanics and makers around the world finally have a pocket tool for solving their every-day technical problems.What sets The Pocket Engineer apart? - The silky smooth matte black enamel finish gently fillets the laser-cut edges which makes it a pleasure to handle in the field, ensuring it won’t carve into your pencil lead. - The surprisingly massive stainless-steel feel helps secure it in windy conditions unlike a plastic card or ruler. - Laser-engraved markings and text are guaranteed to not rub off like other ink printed rulers.What features did you pack into this little pocket tool?1) Solid metal 3 inch design that fits in your wallet and is TSA compliant when traveling for field work.2) Photogrammetric ruler for calibrating scale and tilt in field or lab images.3) 10 physical constants and 7 fundamental equations from physics and engineering.4) Temperature, pressure, mass, length and power conversions plus trigonometry quick reference.5) Imperial and metric straight-edge to 85 mm and 2" ruler with 10-mil resolution. 6) Angle measurement and drawing tool with 5 degree resolution.7) Fractional inch to decimal inch quick reference to 1/16th inch resolution 8) Pipe/tube inner diameter measurement using corner to 1.25 inch maximum.9) Arc and circle drawing protractor tools with 1/8th inch or 5 mm resolution.10) 42 digits of pi. Because we could.11) QR code links to monthly bonus content and discounts on a hidden GLG page.Who needs this?This is a perfectly thoughtful and unique gift for students, professionals or teachers in any engineering or mechanical field!Not sure if you’ll like it?You can return it within 30 days for a full refund if you don't love it! Seriously. Get it! Review: Nice little tool - Nice and compact. Bought 2 one for me and one for my engineering student child!! Review: Muy práctica para llevar en la cartera. ## Features - FITS WITH YOUR CREDIT CARDS: Sized exactly to a standard credit card or ID for stealthy every day carry in your wallet or money clip. Perfect for field work or lab work. - PACKED WITH REFERENCE INFO: Never look up a basic engineering equation, physical constant or unit conversion again. - EQUIPPED FOR TECHNICAL DRAWINGS: Always be ready to take a quick measurement or sketch a new design accurately with the ruler, protractor and angle drawing tools. - NEVER OBSOLETE: Give a professional, student or budding young engineer a unique, thoughtful and practical gift that will stay with them for many years from homework to cutting-edge research. - LASTS A LIFETIME: 0.5 mm thick laser-cut enamel-coated stainless steel built for a lifetime of use and abuse. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08M5SNYKZ | | Batteries Required? | No | | Batteries included? | No | | Best Sellers Rank | 83,114 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 511 in Rulers (Stationery & Office Supplies) | | Colour | Black | | Customer Reviews | 4.7 4.7 out of 5 stars (604) | | Date First Available | 5 Sept. 2019 | | Item Package Quantity | 1 | | Item Weight | 30 g | | Item model number | TPE001 | | Manufacturer | Genius Lab Gear | | Material | Stainless Steel | | Measurement System | Inch | | Part Number | TPE001 | | Product Dimensions | 8.41 x 5.31 x 0.25 cm; 30 g | | Size | 3 Inch | | Style | functional | ## Product Details - **Brand:** Genius Lab Gear - **Colour:** Black - **Graduation range:** 1/16 Inches - **Material:** Stainless Steel - **Style:** functional ## Images ![The Pocket Engineer - Wallet Engineering Ruler Scale and Unit Conversion Reference 3 inch - Image 1](https://m.media-amazon.com/images/I/61yczeuKpFL.jpg) ## Questions & Answers **Q: What is the purpose of this stainless steel card?** A: It serves as a practical tool for engineers and makers as an everyday carry gift, fitting in your wallet or money clip alongside credit cards or IDs. **Q: What reference information does it contain?** A: It includes basic engineering equations, physical constants, and unit conversions that would normally be in the cover of a textbook. No need to grab your distracting phone while doing homework on on the job site. **Q: How durable is this card?** A: It's entirely stainless steel and laser etched black enamel, so it won't wear down. The 0.5 mm thick laser-cut stainless steel can be bent with enough force but can easily live in your wallet or notebook for many years. **Q: What technical drawing tools does this card offer?** A: It includes a ruler, protractor, and angle drawing tools, making it handy for quick measurements and accurate sketches. **Q: Who would benefit from receiving this stainless steel card as a gift?** A: Professionals, students, and budding engineers in civil, chemical, electrical, mechanical, materials, nuclear, and aerospace will appreciate this unique and practical gift that remains relevant from homework to cutting-edge research. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Nice little tool *by A***I on 21 October 2024* Nice and compact. Bought 2 one for me and one for my engineering student child!! ### ⭐⭐⭐⭐⭐ Review *by D***O on 6 August 2025* Muy práctica para llevar en la cartera. ### ⭐⭐⭐⭐⭐ Review *by E***E on 26 December 2025* Perfect size and very sturdy. Will be used daily for work ## Frequently Bought Together - The Authentic Pocket Engineer - Small Metal Engineering Ruler Protractor Compass Scale, Techie Graduation Gadget Multitool, Mechanical/Civil Engineers Gift, Metric Mini 3 Inch Tool- Genius Lab Gear - Stocking Stuffers for Adults- Gifts for Men, 9 in 1 Multitool Pen, Christmas Gift for Dad, Gifts for Him, Tool Gifts for Dad from Kids, Gifts for Husband, Boyfriend, Grandpa(Silver) - BOSCH GLM100-23 100 Ft Blaze Laser Distance Measure, Includes 2 AA Batteries --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.at/products/464877332-the-pocket-engineer-wallet-engineering-ruler-scale-and-unit-conversion](https://www.desertcart.at/products/464877332-the-pocket-engineer-wallet-engineering-ruler-scale-and-unit-conversion) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-04-22*