--- product_id: 704634774 title: "MusicNomad Premium Truss Rod Wrench - 4mm for MARTIN® Guitar Models DSS, OMSS, Modern Deluxe Series, SC-13E and other Acoustic Guitar Brands (MN237)" brand: "musicnomad" price: "€ 29.60" currency: EUR in_stock: true reviews_count: 5 category: "Music Nomad" url: https://www.desertcart.hr/products/704634774-musicnomad-premium-truss-rod-wrench-4mm-for-martin-guitar-models store_origin: HR region: Croatia --- # 4mm precision fit Durable steel with ball end 4.75" long ergonomic arm MusicNomad Premium Truss Rod Wrench - 4mm for MARTIN® Guitar Models DSS, OMSS, Modern Deluxe Series, SC-13E and other Acoustic Guitar Brands (MN237) **Brand:** musicnomad **Price:** € 29.60 **Availability:** ✅ In Stock ## Summary > 🔧 Tune Like a Pro, Adjust with Confidence! ## Quick Answers - **What is this?** MusicNomad Premium Truss Rod Wrench - 4mm for MARTIN® Guitar Models DSS, OMSS, Modern Deluxe Series, SC-13E and other Acoustic Guitar Brands (MN237) by musicnomad - **How much does it cost?** € 29.60 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/704634774-musicnomad-premium-truss-rod-wrench-4mm-for-martin-guitar-models) ## Best For - musicnomad enthusiasts ## Why This Product - Trusted musicnomad brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Laser-Etched Size Marking:** Never second-guess your tool—clear 4mm marking for quick identification. - • **Built to Last with Premium Steel:** Black nickel finish resists wear, ensuring your wrench stays reliable gig after gig. - • **Extended 4.75" Arm with Ball End:** Reach deep truss rods effortlessly with smooth, accurate adjustments. - • **Precision 4mm Fit for MARTIN Models:** Tailored for DSS, OMSS, Modern Deluxe & SC-13E guitars—perfect fit, zero slip. - • **Ergonomic Handle for Ultimate Control:** Comfort meets function—turn with ease and avoid hand fatigue. ## Overview The MusicNomad Premium 4mm Truss Rod Wrench is engineered specifically for select MARTIN acoustic guitars and other brands requiring a 4mm size. Featuring a durable steel ball-end design and an ergonomic 4.75" handle, it offers precision, comfort, and long-lasting performance for professional-grade guitar maintenance. ## Description Having the right tool to perform your key gear adjustments is essential. MusicNomad's 4mm Truss Rod Wrench is the perfect tool for adjusting Truss Rods that are located deeper in the soundhole. Our durable steel construction with a black nickel finish is designed to work over and over again. The 4.75” long arm combined with the ball end design allows you to adjust Truss Rods found on popular acoustic guitars that use a 4mm nut, such as MARTIN Guitar models DSS, OMSS, Modern Deluxe Series and SC-13E. The ergonomic handle provides extra length, comfort and control, making turning easier. That’s MusicNomad quality - raising the bar in equipment care. MARTIN and all other third party brand names are trademarks of their respective owners. Music Nomad LLC is not affiliated with those owners, nor claims ownership of those marks. Review: Built well - Works on my Martin D-18 modern Deluxe (you need a 4mm for the MD as opposed to the 5mm for all their other guitars) Review: Pricey quality - The usual MusicNomad of being well made with clean, precise tools - but pricey. The shape is a huge improvement on fighting with a 'standard' L-shaped allen keys as well, with the ball at the end particularly useful for lining the thing up properly. The handle is plastic but as solid as the rest. ## Features - Fits MARTIN Guitar models DSS, OMSS, Modern Deluxe Series, SC-13E. All other MARTIN Guitars Use Our 5mm Size. This will work for all Other Acoustic Guitar Brands that Require a 4mm Truss Rod Wrench Size in the Soundhole. - Ball End Design with Durable Steel Construction and a 4.75" Long Arm for the Most Popular Acoustic Guitars with a 4mm Nut Size. - Ergonomic Handle for Extra Length, Comfort and Control to Reach your Truss Rod in the Soundhole. - Laser Etched 4mm Size in the Metal so You Always Know the Size Working With. ## Technical Specifications | Specification | Value | |---------------|-------| | Best Sellers Rank | #7,657 in Musical Instruments ( See Top 100 in Musical Instruments ) #172 in Guitar Tools | | Customer Reviews | 4.9 out of 5 stars 77 Reviews | ## Images ![MusicNomad Premium Truss Rod Wrench - 4mm for MARTIN® Guitar Models DSS, OMSS, Modern Deluxe Series, SC-13E and other Acoustic Guitar Brands (MN237) - Image 1](https://m.media-amazon.com/images/I/61wiG7iG6mL.jpg) ![MusicNomad Premium Truss Rod Wrench - 4mm for MARTIN® Guitar Models DSS, OMSS, Modern Deluxe Series, SC-13E and other Acoustic Guitar Brands (MN237) - Image 2](https://m.media-amazon.com/images/I/71vq6YjsV9L.jpg) ![MusicNomad Premium Truss Rod Wrench - 4mm for MARTIN® Guitar Models DSS, OMSS, Modern Deluxe Series, SC-13E and other Acoustic Guitar Brands (MN237) - Image 3](https://m.media-amazon.com/images/I/8139NEsZGyL.jpg) ![MusicNomad Premium Truss Rod Wrench - 4mm for MARTIN® Guitar Models DSS, OMSS, Modern Deluxe Series, SC-13E and other Acoustic Guitar Brands (MN237) - Image 4](https://m.media-amazon.com/images/I/81jmRwrMSnL.jpg) ![MusicNomad Premium Truss Rod Wrench - 4mm for MARTIN® Guitar Models DSS, OMSS, Modern Deluxe Series, SC-13E and other Acoustic Guitar Brands (MN237) - Image 5](https://m.media-amazon.com/images/I/81x-d7PWrpL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Built well *by B***T on 4 June 2026* Works on my Martin D-18 modern Deluxe (you need a 4mm for the MD as opposed to the 5mm for all their other guitars) ### ⭐⭐⭐⭐⭐ Pricey quality *by F***E on 11 December 2025* The usual MusicNomad of being well made with clean, precise tools - but pricey. The shape is a huge improvement on fighting with a 'standard' L-shaped allen keys as well, with the ball at the end particularly useful for lining the thing up properly. The handle is plastic but as solid as the rest. ### ⭐⭐⭐⭐⭐ Perfect fit and excellent build quality *by M***T on 3 February 2026* This MusicNomad 4mm truss rod wrench is exactly what you want for your guitars. I use it on my Seagull and Epiphone acoustics. The fit is precise, with zero play, which gives real confidence when making small, careful truss rod adjustments. No slipping, no rounding. One thing I really appreciate is its versatility. It works equally well whether the truss rod adjustment is inside the sound hole or at the top of the headstock, which makes it extremely practical across different acoustic brands that use a 4mm truss rod. The build quality is excellent. It feels sturdy in the hand, the length provides good leverage without overdoing it, and the finish is clean and professional. If you do your own setups or want a safe, reliable wrench for seasonal adjustments, this is absolutely worth having in your case. Highly recommended. --- ## 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.hr/products/704634774-musicnomad-premium-truss-rod-wrench-4mm-for-martin-guitar-models](https://www.desertcart.hr/products/704634774-musicnomad-premium-truss-rod-wrench-4mm-for-martin-guitar-models) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-08-10*