like the typical wrenches that come with a box of cam-lock furniture are pretty much use once (if you're lucky) and toss. It is adjustable in either direction and can drastically change the way a guitar plays. Martin switched to the 2-way adjustable truss rod in 2006. Golden Nehru Jacket Award, Friends of The Gopher Society, https://www.stewmac.com/Luthier_Tools/T ... nches.html. You can check photos at StewMac or LMI. Finally got the courage to try a truss rod adjustment. 4.8 out of 5 stars 120 $8.99 $ 8. The older 1-way rod … An Unofficial forum for those who love Martin instruments - Founded by Steve Stallings. With a little experience, … Guitar Truss Rod Adjustment Guide This article provides a top-level view of how a truss rod works and how to adjust a truss rod. The 2-way versions uses two parallel rods so it can bend the neck either way. Vencetmat 4mm & 5mm Truss Rod Wrench, Allen Wrench Tool Ball End for Martin Acoustic Guitar Truss Rod Adjustment And Deep or Narrow Truss Adjustment. The truss rod wrench I bought from Stewart-McDonald fits my HD-28 perfectly. I have Bondus on my work bench. Both rods are accessed through the brace. Disclaimer Section: IMHO, YMMV, IMHE, Don't Try This At Home, Take With Grain Of Salt, etc, etc. I suppose I have 2-way rod because I have 000-28 EC whose serial number is from 2008. I never managed to find the screw end with an ordinary wrench so I purchased a ball end one. In order to  alleviate any concerns you have, look here for a truss rod tool. not all 5mm Allen wrenches are made equal. I must assume it is not the advertised 5mm. Thank you very much. It should be a snug fit. The D-18 is an '05. some manufacturers adhere to industry tolerances and some don't (or can't). The one listed at the bottom of the offerings would work well: The HD-28 is a 2004. I'd stick with them or Allen as a source for a high grade wrench. 99 Get it as … Wish I could confirm that. Purchased what was billed as a 5mm allen wrench. For that reason I prefer a ball-end wrench such as the one Martin sells. I believe I have it properly seated -- though I'm not sure I'd describe it as deep -- but it still feels like too much play. So I have a ball-end, long wrench. That one sits right at the edge of the dovetail, so it takes a 4.5" long wrench to reach it. Feels like a little too much play. What year is your guitar? Use the Martin Guitar allen truss rod wrench to adjust your guitar's neck to achieve the action you desire. on the other side of the spectrum, brands like Bondus, Allen, Elklind and Wiha are pretty much the go-to for quality stuff that fits and lasts. How to Adjust an Acoustic Guitar Truss Rod (Excerpt) - YouTube This should be a snug fit, correct? The truss rod is used to counteract the tension of the strings on Martin acoustics. Includes a 4 1/2" bent leg. Adjusting a guitar truss rod is a key part of maintaining optimal … This website uses cookies for functionality, analytics and advertising purposes as described in our, HD-28, D-18, LX-175, LXM, Tele, Dano, Alvarez, Kamaka uke, Queen Annes Revenge, loyal sea dog, grog. The 2-way rod sits very deep and it can be hard to line up a regular hex wrench.