I was honestly surprised how well this worked and how much less fatigue I felt after a long session with my somewhat large weed whacker that vibrates a lot.Good quality i like it very much. I will say it you have sensitive skin wrap a cloth around the shoulder pad i had a slight rash after heavy long use but i was sweating heavily using it on a 20lb 51.7cc grass trimmer in the middle of an August day in TX.Works great use it on my heavy EGO product I use on my yard. Just perfect to relieve the heavy weight of my great EGO tools. Makes life easier.Ergonomically, the strap is good, but the lower locking snap clip that attaches to the machine broke and my weed wacker fell to the ground. When I looked at the locking tab, both posts to the tab were undersized and loose in the clamp mechanism. I have to go through the return process and try a new one. In the meantime, I have to tie the strap around the weed wacker until I can get to a printer to send the item back. Need to include a cheap attachment strap for weed whackers that don't have a hole to hook onto. Update: Company sent replacement part immediately. Good product!"It's not stupid, if it works."I am so glad this item came up as a suggestion when I typed in weed cutter. I did not even know these straps existed. I used it for the first time today on my 14 inch electric weed trimmer. My backyard is very uneven and steep so I can't mow it. It used to wear me out climbing carefully back and forth carrying the weight of the trimmer for long periods of time. This strap takes the weight off your arms and shoulders. I just have to push down a bit on the trigger handle to keep the cutter flat so it does not tip forward too much. I was able to complete the whole backyard in one afternoo nthis time. My hands are tingling from the vibration but my arms, shoulders, and back are fine. I highly recommend this strap to make weed and grass trimming more pleasant and less of a chore.Great strap! Comfortable and easy to adjust. Rubber shoulder sling that grips well and easy to clean. Ive got chainsaw oil all over my truck and don't like many fabric things back there for obvious reasons so the rubber shoulder sling was a big plus. Adjusting slack is easy and the thing stays.. couldn't ask for more from a trimmer strap.Update.. several hours of professional use string trimming fields of weeds and the straps holding up great! LOVE THIS THING!I use this on my Stihl F110 weed eater. I have gone through several slings and harnesses and this LimbSaver is the best yet. I have several LimbSaver gun slings and have always liked them. The weed eater sling lives up to the LimbSaver reputation for comfort and durability. I recommend this product.Cumple con todo lo que indica en la descripción.a must have if you have a battery weed eater....really saves on arm and grip fatigue. Would buy again...and would recommend.Awesome product no more sore back! I would recommend this for sure.