The Darwin’s Grip® The Original Darwin's Grip® mfg in the USA Weed Eater Extension Handle Monkey Grip for String Trimmer - Lawn Care, Landscaping, Ergonomic

OVERVIEW: I'm 6'1" tall, and I use a Stihl FS91R trimmer. Prior to purchasing the "Darwin's Grip" handle, I had moved the D-handle all the way up, right next to the strap holder (after I'd cut away and discarded the plastic hand grip thing that came with 91R). Still, I found myself bending over more than I wished. So I went in search of a solution, and I found the "Darwin's Grip." I do a fair bit of string trimming per week: 10+ hours every week on a hilly, rock-strewn property in West Virginia.SUMMARY: after about six hours of mowing with the Darwin's Grip, I find it is definitely what it advertises to be: a way to remain standing more upright as I use the trimmer. It is definitely a positive addition to my FS91R. I rate this a 5-star product.INSTALLATION: not that challenging. I heeded the advice to avoid over-tightening the hex bolts. I snugged them down, but I did not crank hard on the bolts. It wasn't necessary: snugged down is all that's needed to hold the thing in place.POSITIONING: as others have noted, this will take some fiddling with to get it right for your preferences. For example, the pictures showed the handle on top of the trimmer shaft, at the "12 o'clock" position relative to shaft as you hold the trimmer. I found it more comfortable on my left arm (I'm right handed: I trigger with right and use my left on the handle) to rotate the whole assembly to the left so the handle is at about the 10:30 or 11 o'clock position. Just that little bit helped quite a bit. Expect the initial install to be an approximation, with fine-tuning of position to follow. Also, some "muscle memory" my need to be re-learned to use the new handle naturally. For me that took about an hour.QUALITY/WEIGHT: the whole assembly is very light weight, and I don't notice any difference with my FS91R (14lb machine) with this installed. It seems fairly sturdy, but I would not jerk on the handle, nor push down on it hard. With just normal pressures to control the trimmer this should be just fine. As others have noted, the weak spot in this is the toothed-swivel that allows adjustment of the handle up/down from the trimmer shaft. Again, normal pressures and it'll be fine; aggressive jerking, or pushing down hard would be a problem.VALUE FOR MONEY: the item is $70+ with tax, and at first blush that seems high. But in my early testing of this I've discovered two things: (1) my back is no longer fatigued; and (2) because my back is no longer fatigued, I take fewer pauses, which means my mowing gets done more quickly. Preliminary estimates has the time savings in the 20% to 30% range. So, for me, the $70+ expenses is forgotten, and now I'm enjoying the benefits.

Love it! I was concerned with the handle placement but it works out perfectly. You can adjust it however you want too! Fits perfectly in my stihl fs91r. The whole kid is very lightweight and once I remove the stock handle, I don't think there will be much difference in weight. Finally, the instructions are nicely written.

Works too perfection saving my back for lot of years.

Great product. Well built. Not knocking that. It’s very comfortable when you have a straight line of weed eating. But if you have to go around obstacles, I find that it’s hard to control the trimmer head with the Darwin grip. It’s helpful for weed eating a ditch and hillsIt is definitely a product to have as a second option pending on the yard you servicing on.

What a back saver! Once I found the sweet spot, using the trimmer became my favorite part of tending the yard. I was skeptical, tried cheaper options, but you really do get what you pay for!

I was skeptical about the Darwin's Grip after watching some YouTube reviews, and it seems like the naysayers were either haters or just too short to benefit! I have a hill the length of a football field that I need to weed-eat, and this tool has been a total game-changer. Before using the Darwin's Grip, my back would need a full day to recover from the strain. Now? Zero back pain. I was so impressed, I almost ended up weed-eating my entire yard! Highly recommend this for anyone looking to make weed-eating easier and pain-free.

I originally chose this company because I was referred by a friend who also has the same one. I like that you can change the angle on this one to adjust to your need. I like the product and design. However, the mounting bracket is low quality. I Broke the piece just tightening it down to the handle. I didn’t even tighten it too tight either. Just snug enough so the handle wasn’t loose. Disappointed in the quality of the bracket. I expected better and a high quality handle for $60.

Game changer, especially for those with back or mobility issues. Easy to install and adjust. Ready to go in less than 15 minutes for new users. Highly recommend!