--- product_id: 724685962 title: "Professional 30cm 12\" Metric Triangular Aluminum Scale Engineering Ruler 1:20, 1:25, 1:50 1:75 , 1:100, 1:125" brand: "ocm brand" price: "NZ$84" currency: NZD in_stock: true reviews_count: 5 category: "Ocm Brand" url: https://www.desertcart.nz/products/724685962-professional-30cm-12-metric-triangular-aluminum-scale-engineering-ruler-1 store_origin: NZ region: New Zealand --- # 6 precision scales cast aluminum durability triangular safe cutting edge Professional 30cm 12" Metric Triangular Aluminum Scale Engineering Ruler 1:20, 1:25, 1:50 1:75 , 1:100, 1:125 **Brand:** ocm brand **Price:** NZ$84 **Availability:** ✅ In Stock ## Summary > 📐 Elevate your craft with precision that professionals trust! ## Quick Answers - **What is this?** Professional 30cm 12" Metric Triangular Aluminum Scale Engineering Ruler 1:20, 1:25, 1:50 1:75 , 1:100, 1:125 by ocm brand - **How much does it cost?** NZ$84 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/724685962-professional-30cm-12-metric-triangular-aluminum-scale-engineering-ruler-1) ## Best For - ocm brand enthusiasts ## Why This Product - Trusted ocm brand brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Cutting Edge Safety:** Triangular profile ensures safer, more stable cutting and scoring. - • **Risk-Free Confidence:** 100% money-back guarantee—because your satisfaction is non-negotiable. - • **Six Scales, One Tool:** Master every project with 1:20 to 1:125 precision scales on three sides. - • **Smudge-Free Precision:** Concave base design prevents smearing for flawless, clean lines every time. - • **Engineered for Endurance:** Robust cast aluminum body built to withstand daily professional use. ## Overview The OCM Professional 12" Triangular Aluminum Scale Ruler combines six metric scales (1:20 to 1:125) in a durable cast aluminum triangular body designed for architects, engineers, and technical professionals. Its concave base minimizes smearing, while the sturdy construction ensures safe cutting and long-lasting use. Backed by a 100% money-back guarantee, this ruler is a reliable tool for precision measurement and drafting. ## Description Great prices on your favourite Office brands plus free delivery and returns on eligible orders. Review: Works perfectly Review: Well made. I don't use it for it's proper use. I use it to trim off the batting from my quilting blocks. ## Features - CAST ALUMINUM 12 Inch Engineer scale ruler with triangular body for safer cutting and scoring of materials. - Scales 1:20, 1:25, 1:50, 1:75, 1:100, 1:125. For professional applications, architecture, engineering, and technical drawing. - Clearly marked metric graduations, Easy-to-read printed graduations. - Three sides with six different scales, Concave base reduces smearing when drawing. - 100% MONEY BACK GARANTEE - We at OCM are Confident That You Will Be Happy With Our Triangular Ruler, However if it does not meet your satisfaction - We will Honor a Full Refund, No Questions Asked ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01MQSQJCJ | | Brand | OCM Brand | | Colour | Chrome | | Customer Reviews | 4.7 4.7 out of 5 stars (258) | | Date First Available | 4 Dec. 2016 | | Item Weight | 90.6 g | | Manufacturer | OCM | | Manufacturer Part Number | R12M | | Material Type | Aluminium | | Model Number | OP-33808 | | Product Dimensions | 31.75 x 2.54 x 0.1 cm; 90.72 g | ## Product Details - **Brand:** OCM Brand - **Colour:** Chrome - **Graduation range:** 30 Centimetres - **Material:** Aluminium - **Style:** Triangular ## Images ![Professional 30cm 12" Metric Triangular Aluminum Scale Engineering Ruler 1:20, 1:25, 1:50 1:75 , 1:100, 1:125 - Image 1](https://m.media-amazon.com/images/I/51jmv7g9QCL.jpg) ![Professional 30cm 12" Metric Triangular Aluminum Scale Engineering Ruler 1:20, 1:25, 1:50 1:75 , 1:100, 1:125 - Image 2](https://m.media-amazon.com/images/I/61LbVAwnMUL.jpg) ![Professional 30cm 12" Metric Triangular Aluminum Scale Engineering Ruler 1:20, 1:25, 1:50 1:75 , 1:100, 1:125 - Image 3](https://m.media-amazon.com/images/I/61yLzQN6wnL.jpg) ![Professional 30cm 12" Metric Triangular Aluminum Scale Engineering Ruler 1:20, 1:25, 1:50 1:75 , 1:100, 1:125 - Image 4](https://m.media-amazon.com/images/I/71bn5Aq4XqL.jpg) ![Professional 30cm 12" Metric Triangular Aluminum Scale Engineering Ruler 1:20, 1:25, 1:50 1:75 , 1:100, 1:125 - Image 5](https://m.media-amazon.com/images/I/71nzr+ftQQL.jpg) ## Questions & Answers **Q: Why is your 1:125 scale so far off? No QA department?** A: You sure you are working in METRIC? **Q: This is cm or inch?** A: Cm/mm ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by K***O on 21 August 2023* Works perfectly ### ⭐⭐⭐⭐⭐ Review *by M***E on 7 August 2025* Well made. I don't use it for it's proper use. I use it to trim off the batting from my quilting blocks. ### ⭐⭐⭐ Review *by H***A on 6 January 2023* Es muy bueno, aguanta bastante bien los golpes pero se le borran los números y las lineas muy fácilmente ## Frequently Bought Together - OCM Metric Triangular Engineer Scale Ruler (Proffessional Grade Solid Aluminum) 30 Centimeters Metric Engineering Architectural Mechanical Drafting Ruler - 1:20, 1:25, 1:50 1:75, 1:100, 1:125 - Architectural Scale Ruler, Imperial Measurements 12'', Laser-Etched Aluminum Architect Triangular Ruler Black for Architects, Students, Draftsman, and Engineers by mveohos - Intoy 12 Inch Triangular Engineer Scale Ruler, Anodized Solid Aluminum Core with Laser Etched Scales, Imperial Scale - 1:10, 1:20, 1:30, 1:40, 1:50, 1:60, Ideal for Civil Engineering Drafting --- ## 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.nz/products/724685962-professional-30cm-12-metric-triangular-aluminum-scale-engineering-ruler-1](https://www.desertcart.nz/products/724685962-professional-30cm-12-metric-triangular-aluminum-scale-engineering-ruler-1) --- *Product available on Desertcart New Zealand* *Store origin: NZ* *Last updated: 2026-04-29*