--- product_id: 7180164 title: "Grover 406C Mini Locking Rotomatic Tuners - 3+3 - Chrome" brand: "grover" price: "€ 106.19" currency: EUR in_stock: true reviews_count: 13 category: "Grover" url: https://www.desertcart.pt/products/7180164-grover-406c-mini-locking-rotomatic-tuners-3-3-chrome store_origin: PT region: Portugal --- # chrome finish with stainless steel durability locking cam post for string security 18:1 precision gear ratio Grover 406C Mini Locking Rotomatic Tuners - 3+3 - Chrome **Brand:** grover **Price:** € 106.19 **Availability:** βœ… In Stock ## Summary > πŸ”§ Lock in your sound, unlock your potential! ## Quick Answers - **What is this?** Grover 406C Mini Locking Rotomatic Tuners - 3+3 - Chrome by grover - **How much does it cost?** € 106.19 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/7180164-grover-406c-mini-locking-rotomatic-tuners-3-3-chrome) ## Best For - grover enthusiasts ## Why This Product - Trusted grover brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Lock & Stay in Tune:** Innovative internal cam locking mechanism ensures strings stay locked and stable under any playstyle. - β€’ **Quick String Changes:** Mini-button design and locking system make restringing faster than everβ€”no more downtime. - β€’ **Sleek & Durable Chrome:** Premium chrome plating combined with stainless steel construction for a polished look that lasts. - β€’ **Universal Fit & Upgrade:** Perfect drop-in replacement for popular models like PRS SE Custom 24 and Gretsch Electromatic, no mods needed. - β€’ **Effortless Tuning Precision:** 18:1 gear ratio delivers ultra-fine tuning control for perfect pitch every time. ## Overview The Grover 406C Mini Locking Rotomatic Tuners feature a high-precision 18:1 gear ratio and a patented internal cam locking system that guarantees stable tuning and quick string changes. Crafted from durable stainless steel with a sleek chrome finish, this 3+3 set fits a wide range of electric guitars, making it a top choice for professionals seeking reliable performance and style. ## Description Grover Rotomatic 406C locking guitar tuning machine heads give you easy tuning and positive string locking. With a gear ratio of 18:1, these locking tuners serve up all the goodness of standard Rotomatics - plus Grover's internal cam post. Stick the string through the string hole, hand pull to tension, and begin tuning. As you start to tune, only the locking cam inside the string post turns. The string post itself starts turning once the string is locked. In under one revolution of the string post, you'll be in tune - and you'll stay that way! Upgrade your axe with Grover's Rotomatic 406C locking guitar tuning machines. Review: Great locking tuners. - Love these Grover Rotomatics. Fit my PRS SE Custom 24 perfectly. Easiest locking tuners to make string changes once you know the secret of how to align the internal cam holes......turn the post till you feel the click. Review: Drop-in replacement on PRS SE Standard, weighs less than stock - As others have noted, these are a direct drop-in replacement tuner on (most?) PRS SE guitars.. everything including the screw hole lined up perfectly on the PRS SE Standard I installed them in, and looking at a PRS SE EG, they also line up perfectly for that guitar. I ended up using the screws, washer, and bushings from the PRS tuners; I may also swap the knobs out in the future, if the PRS ones will work (not sure.) [March 2012 - I finally got around to seeing if the PRS knobs would work on the Grover tuners; they will not.. so if you buy these for a PRS SE, be prepared for your guitar to look slightly off "stock". Bummer, as I do like the look and feel of the PRS knob much better.. but then again, with these tuners, hardly have to touch 'em.] One thing I've heard some people mention about locking tuners is that they weigh more.. I didn't think it'd really matter either way to me, but for the fun of it I figured I'd compare using my kitchen scale. I took the card with all six tuners in it out of the plastic package, and weighed the Grover tuners before swapping.. these 406c's come in at 7.05oz. After swapping the tuners, I put the six PRS tuners back into the same card, and weighed them.. they came in at 7.45oz. So the replacement locking tuners actually weigh less than stock. That may be due to the knobs (the Grover knobs are noticeably smaller); not sure if that would make up a full .4oz though. In any case, installation was quick (it took about 20 minutes from the time I removed the old strings to when the new strings with the new tuners were tuned up and ready to go), and after 'stretching' the strings a few times and re-tuning, they seem to be staying in tune pretty well. Time will tell! Also worth noting that these tuners had no problems at all fitting heavier strings; I installed a set of D'Addario EXL117's, which are set up for Drop D tuning, and the heaviest string is a .056.. not the heaviest string in the world, but as heavy as I'm interested in playing. ## Features - Locking Guitar Tuning Machine Heads (3 + 3 Configuration) - Enclosed Permanently Lubricated - Set of 6 - with Mini-Buttons - 18:1 Gear Ratio - Chrome ## Technical Specifications | Specification | Value | |---------------|-------| | Best Sellers Rank | #44,778 in Musical Instruments ( See Top 100 in Musical Instruments ) #213 in Electric Guitar Tuning Keys | | Customer Reviews | 4.7 out of 5 stars 622 Reviews | ## Images ![Grover 406C Mini Locking Rotomatic Tuners - 3+3 - Chrome - Image 1](https://m.media-amazon.com/images/I/612LVJ7R2lL.jpg) ![Grover 406C Mini Locking Rotomatic Tuners - 3+3 - Chrome - Image 2](https://m.media-amazon.com/images/I/51f8MYCD7HL.jpg) ![Grover 406C Mini Locking Rotomatic Tuners - 3+3 - Chrome - Image 3](https://m.media-amazon.com/images/I/71klkeWzaNL.jpg) ![Grover 406C Mini Locking Rotomatic Tuners - 3+3 - Chrome - Image 4](https://m.media-amazon.com/images/I/61f10FMpfEL.jpg) ![Grover 406C Mini Locking Rotomatic Tuners - 3+3 - Chrome - Image 5](https://m.media-amazon.com/images/I/51Nq2F858CL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Will these fit a Taylor 210ce?** A: They will fit fine, and if you want to maintain the stock appearance of the Taylor 210ce, save the knobs and screws so you can put them on the new Rotomatics. I did that with a PRS SE Custom 24 and a Michael Kelly, Les Paul style guitar that I upgraded. **Q: Fit a Gretsch g5222 ?** A: Yes! **Q: Can you purchase larger tuning keys for the tuner?** A: Yes type in the search for β€œGrover tuner buttons” The regular rotomatic buttons are larger and the hipshot buttons should fit as well **Q: will these tuners fit a 1981 les paul fire brand guitar ?** A: They would work, but Les Paul guitars use Kluson tuners so the mounting holes on the Grovers will not match the original holes, and probably won't completely cover the existing holes. Also the holes in the head-stock may be a different diameter. You would be better off replacing the original tuners with these: Kluson Revolution 3X3 Locking Tuners, Keystone Buttons - NICKEL, for sale on Amazon for $88.79 with Perloid buttons which are probably like the originals, and will install without modifications. I used The Kluson locking tuners on an Oscar Schmidt OE35 which is a Gibson ES 335 clone and they work perfectly. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great locking tuners. *by R***. on October 23, 2025* Love these Grover Rotomatics. Fit my PRS SE Custom 24 perfectly. Easiest locking tuners to make string changes once you know the secret of how to align the internal cam holes......turn the post till you feel the click. ### ⭐⭐⭐⭐⭐ Drop-in replacement on PRS SE Standard, weighs less than stock *by N***T on January 11, 2012* As others have noted, these are a direct drop-in replacement tuner on (most?) PRS SE guitars.. everything including the screw hole lined up perfectly on the PRS SE Standard I installed them in, and looking at a PRS SE EG, they also line up perfectly for that guitar. I ended up using the screws, washer, and bushings from the PRS tuners; I may also swap the knobs out in the future, if the PRS ones will work (not sure.) [March 2012 - I finally got around to seeing if the PRS knobs would work on the Grover tuners; they will not.. so if you buy these for a PRS SE, be prepared for your guitar to look slightly off "stock". Bummer, as I do like the look and feel of the PRS knob much better.. but then again, with these tuners, hardly have to touch 'em.] One thing I've heard some people mention about locking tuners is that they weigh more.. I didn't think it'd really matter either way to me, but for the fun of it I figured I'd compare using my kitchen scale. I took the card with all six tuners in it out of the plastic package, and weighed the Grover tuners before swapping.. these 406c's come in at 7.05oz. After swapping the tuners, I put the six PRS tuners back into the same card, and weighed them.. they came in at 7.45oz. So the replacement locking tuners actually weigh less than stock. That may be due to the knobs (the Grover knobs are noticeably smaller); not sure if that would make up a full .4oz though. In any case, installation was quick (it took about 20 minutes from the time I removed the old strings to when the new strings with the new tuners were tuned up and ready to go), and after 'stretching' the strings a few times and re-tuning, they seem to be staying in tune pretty well. Time will tell! Also worth noting that these tuners had no problems at all fitting heavier strings; I installed a set of D'Addario EXL117's, which are set up for Drop D tuning, and the heaviest string is a .056.. not the heaviest string in the world, but as heavy as I'm interested in playing. ### ⭐⭐⭐⭐⭐ Great Replacement Gretsch Electromatic *by P***E on July 10, 2025* Great product. Wasn't quite sure how it worked. Watched a quick video on it. About as easy as it gets. Installed them on a Gretsch Electromatic without any modification needed. ## Frequently Bought Together - Grover 406C Rotomatic Mini 3 per Side Self Locking Machine Heads, Chrome - Grover SPERZEL LOCKING 3 ON A SIDE KIGH POLISHED NICKLE PLATED WITH MOUNTING PARTS Machine Heads (102-18C) - Ernie Ball Regular Slinky Nickel Wound Electric Guitar Strings, 10-46 Gauge (P02221) --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/7180164-grover-406c-mini-locking-rotomatic-tuners-3-3-chrome](https://www.desertcart.pt/products/7180164-grover-406c-mini-locking-rotomatic-tuners-3-3-chrome) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-05-13*