--- product_id: 63461935 title: "HMM Rule One - Pen & Ruler Tool for Designers: Multi-Use, Sleek Aluminum Bookmark with Interchangeable Heads (Ballpoint, Stylus, Lanyard), Signo Refill" brand: "hmm" price: "5 zł" currency: PLN in_stock: false reviews_count: 4 url: https://www.desertcart.pl/products/63461935-hmm-rule-one-pen-and-ruler-tool-for-designers-multi store_origin: PL region: Poland --- # Compact design Interchangeable heads Smooth ink flow HMM Rule One - Pen & Ruler Tool for Designers: Multi-Use, Sleek Aluminum Bookmark with Interchangeable Heads (Ballpoint, Stylus, Lanyard), Signo Refill **Brand:** hmm **Price:** 5 zł **Availability:** ❌ Out of Stock ## Summary > Elevate your creativity on-the-go! ✨ ## Quick Answers - **What is this?** HMM Rule One - Pen & Ruler Tool for Designers: Multi-Use, Sleek Aluminum Bookmark with Interchangeable Heads (Ballpoint, Stylus, Lanyard), Signo Refill by hmm - **How much does it cost?** 5 zł with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/63461935-hmm-rule-one-pen-and-ruler-tool-for-designers-multi) ## Best For - hmm enthusiasts ## Why This Product - Trusted hmm brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Multi-Use Tool:** Equipped with ballpoint, stylus, and lanyard heads. - • **Sleek & Compact:** Lightweight aluminum, perfect for on-the-go professionals. - • **Versatile Design:** Seamlessly transitions from paper to tablet. - • **Easy Switching Mechanism:** Quickly swap heads without losing style. - • **Premium Writing Experience:** Enjoy smooth, precise writing with Signo refill. ## Overview The HMM Rule One is a multi-use pen and ruler tool designed for modern creatives. With its sleek aluminum body, interchangeable heads, and premium writing experience, it effortlessly adapts to both traditional and digital mediums, making it an essential accessory for designers and professionals alike. ## Description Born on a kickstarter, red dot award, this is a hybrid halfway between a pen and a finely crafted ruler that fits your notebook perfectly as a bookmark while allowing a smoother drawing experience on paper and tablet. ## Features - Versatile Design: This innovative pen-ruler combo is designed for versatility, seamlessly transitioning from drafting on paper to navigating on tablets. Its distinct droplet shape doubles as a bookmark, making it an essential companion for your notebook - Multi-Use Tool: Equipped with interchangeable heads, including a ballpoint, stylus, and lanyard, this tool adapts to various creative demands, whether you're sketching, writing, or using digital devices - Sleek & Compact: Measuring 138x25x11mm and weighing 60g, this tool is crafted from finely milled aluminum. The sleek design is not only aesthetically pleasing but also compact and lightweight, ideal for designers and professionals on the go - Easy Switching Mechanism: The changeable screw located at the top of the ruler enables quick and easy swapping of heads, enhancing the tool's functionality without compromising its streamlined silhouette - Premium Writing Experience: The pen comes with a Signo refill UMR-85, known for its smooth ink flow and precision, ensuring a delightful and efficient writing or drawing experience every time ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | HMM | | Brand | HMM | | Item Weight | 5.4 ounces | | Product Dimensions | 5.4 x 1 x 0.4 inches | | Is Discontinued By Manufacturer | No | | Color | Black | | Closure | screw | | Pencil Lead Degree (Hardness) | H | | Material Type | Aluminum | | Ink Color | Black | ## Images ![HMM Rule One - Pen & Ruler Tool for Designers: Multi-Use, Sleek Aluminum Bookmark with Interchangeable Heads (Ballpoint, Stylus, Lanyard), Signo Refill - Image 1](https://m.media-amazon.com/images/I/71lUtAn+SdL.jpg) ![HMM Rule One - Pen & Ruler Tool for Designers: Multi-Use, Sleek Aluminum Bookmark with Interchangeable Heads (Ballpoint, Stylus, Lanyard), Signo Refill - Image 2](https://m.media-amazon.com/images/I/61o3Pyzd1SL.jpg) ![HMM Rule One - Pen & Ruler Tool for Designers: Multi-Use, Sleek Aluminum Bookmark with Interchangeable Heads (Ballpoint, Stylus, Lanyard), Signo Refill - Image 3](https://m.media-amazon.com/images/I/51VcYgHDcdL.jpg) ![HMM Rule One - Pen & Ruler Tool for Designers: Multi-Use, Sleek Aluminum Bookmark with Interchangeable Heads (Ballpoint, Stylus, Lanyard), Signo Refill - Image 4](https://m.media-amazon.com/images/I/61GPWKINgPL.jpg) ![HMM Rule One - Pen & Ruler Tool for Designers: Multi-Use, Sleek Aluminum Bookmark with Interchangeable Heads (Ballpoint, Stylus, Lanyard), Signo Refill - Image 5](https://m.media-amazon.com/images/I/51StrsvFXQL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐ 4.0 out of 5 stars Nice product *by R***W on Reviewed in the United States on January 3, 2019* Item is well made and comes in nice packaging. Writes nicely (fine lines). Lightweight and not too bulky when in pocket. ### ⭐⭐⭐ 3.0 out of 5 stars For Richard Bondi *by B***E on Reviewed in the United States on August 12, 2019* According to Jetpens this is the Original refillUni UMR-83 Gel Pen Refill - 0.38 mm - Black ### ⭐⭐⭐⭐ 4.0 out of 5 stars Tiny bit of Black rubbed off after a year, and nobody knows what the refills are *by R***I on Reviewed in the United States on August 7, 2019* After a year of use, the very end of the e black edges of the octagon have worn to an aluminum silver from constant rotation: the black color has worn off. Also one edge of the ruler. But, I’ve used the pen very heavily, thrown into bags etc. So ymmv.Also, I've been unable to find a ball point pen cartridge to replace the original after it ran out of ink. The ruler does NOT use the Schmidt P900 Parker Style Refill that HMM uses in its similar product HMM Slide. It doesn't fit: I found that out the hard way. I've been using a knife to carve other refills to fit, but that's getting old and I'm about ready to give up.If anyone knows what pen cartridge Rule One takes, please let me know here.Apart from that, it is a beautiful product and a joy to use -- or was until the black and the pen wore out. --- ## 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.pl/products/63461935-hmm-rule-one-pen-and-ruler-tool-for-designers-multi](https://www.desertcart.pl/products/63461935-hmm-rule-one-pen-and-ruler-tool-for-designers-multi) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-15*