I have quite a few heads, but I bought this sturdy one too NOW for the convenience of installing trimmer line compared to others that have an Allen screw (I don't think half a minute for tightening is an issue)
The plastic cap came off in the first 5 minutes; I looked for it, found it, and put it back in place, BUT I tightened it by passing a screwdriver through the holes, it tightened very well and never came off again
Also, instead of using 4 trimmer lines, we can use 2, one in each hole and let 1 centimeter pass into the other
Also, when we use it with 4 and they wear out, we pull one side and it works with 2, so this way we save money

I saw the true light!

In combination with the Visco Parts 3924 trimmer line (3.9mm), it didn’t notice a thing. And the brush cutter is nothing special (Stihl FS55), but combined with this head, you just rested it on the ground and it really plowed through.

Compared to the original head, I cleared the same area in at least half the time and with less vibration.

It's a pity that they sell the cap with the metal tip separately. You waste half the line that you put in.

Very good, the line does not break due to its shape... it fits up to 4mm square... twisted and round ones go in more easily...

Excellent head in every respect, very easy to install (on a Nakayama PB7700 in my case), and also extremely user-friendly. You can change the trimmer line in no time without any tools. You can carry a few pieces of trimmer line with you in case you need to change it, so you don't waste any time at all. With Nakayama NC1013 Aluminum Square Trimmer Line, 3mm thick, you can cover large areas without much effort, even in dense and tough (woody) green/dry grass.

Watching videos online, I believed that this was a very good trimmer head and I bought it. As soon as I installed and used it, I noticed the following:
1. The plastic part that goes underneath unscrewed, got lost in thick grass, and I never found it again. Maybe I hadn't screwed it on properly.
2. I decided to use 4.3 mm square twisted trimmer line. It took me 4-5 minutes to install it. I didn't try a thinner one, which might fit more easily.
For me, who wants to start and finish cutting the grass on my small, difficult plot without stopping at all, it is unsuitable.

Very good head... you change the line effortlessly and without tools. (I was fed up with the previous one that wouldn't unscrew) It doesn't cut/shave very low, but it is much more efficient (powerful) than the classic heads.

Unfortunately, it did not work on my brush cutter. Huzvarna 235. Maybe I am doing something wrong or it is intended for much more powerful brush cutters. That's why I gave it 3 stars. I wish it worked!

When I started, the grass was one meter high. I used the line that came with the head. It cut everything. Even those with a stem of 2-3 centimeters. First time with a brush cutter, I did the 2 acres in 1.5 days. About 2 hours before I finished, I changed the line because it was shortened by about 4 centimeters on each side, but it was still cutting. I am posting photos of before and after. I did not use the brush cutter head to compare it. Maybe next time. I recommend it.

Very user-friendly head, extremely fast line change without any tools, the only drawback is the leftover line when it gets shorter and is no longer effective. From each piece of about 40 centimeters of new line, 25 are thrown away due to the design. I solved it by using another head, with the leftover pieces, which came with the Echo trimmer and now I only throw away 5 centimeters. Try it, especially with expensive lines, it's a shame to throw away 60%.

Very cheap and defective head, the cap does not fit and will definitely be lost during operation. No comparison with the Jetfit

Really, after testing, it is very good. It saved me. It doesn't throw the line, changes without a key very easily.

If you haven't bought it yet, get it! The fishing line doesn't break no matter what! I use 4.9mm which barely fits but it even cuts stones!

Despite the fact that I was careful and particularly meticulous, the plastic cap at the front eventually came off after 4-5 hours of operation, and I am sure I had screwed it on correctly because I checked it. For replacing the trimmer line up to four millimeters, I consider it to be very good.

With eyes closed, the first accessory that a grass trimmer needs, whether it's Chinese or a branded one, you will see a big difference!

Ease, speed in changing the trimmer line.
The trimmer line does not break when it encounters strong resistance from obstacles (stones, tough grass) due to the acute angle at which it comes out of the head, unlike other heads where it comes out at a right angle.

Easy installation and even easier replacement of the trimmer line. It made things much easier for me compared to the Stihl cutting heads, which I find completely impractical.

I didn't expect it. I am satisfied. When you use a 4.3mm lace it gets a bit tight. Other than that, I think it's worth it.

It does not fit my lawnmower, brand Stihl, no matter how many of the auxiliary washers I used. It does not tighten enough and is not stable.

Very good. On 6 acres, 2 changes of trimmer line; the cap, if you tighten it a bit as shown, does not come off.

The best one I have tried.
The 3mm trimmer lines I use almost never break.
They simply wear down and get shorter gradually with use.

I am buying it for the second time. Very easy to use and durable. Because it has four outlets and is a bit heavy, it requires a powerful trimmer. It also has a high consumption of line. The best I have tried.

I got to know the product through the show Farm Evolution, and it is the best I have tried so far. It works just as well with double nylon line as with single. Great savings on line breakages; for example, with a piece of about 130 meters, I used to stop about 5-6 times to change the line, but now I only stopped at the end to change it because it was worn out. I should also note that with a little effort, it fits the 4.9 mm line, which I use. The cap needs some attention when placing it; I managed to lose it when I started cutting grass in a rocky area. Soon I will order a second head as a spare.

Quite a good head! Its main advantage is the ability to change the line without using tools, but it also has some negatives, such as: 1. It has a rather large and thick profile, resulting in not being able to cut very low, 2. The exits can be double, but they are one above the other, so both do not participate in the area you are aiming at, 3. You waste quite a bit of line, 4. The cap, as most people say, indeed does not lock well, and at some point you will lose it… 5. Well, you can't call it cheap…

The stars for this tool are too few!! It truly made things so much easier for me, no need to wind, no need to stop, it doesn't even flinch!! I cut 500 meters of plot today with one trimmer line (pair). Worth every euro!!

I bought it after reading the reviews here and since most of them are positive, honestly I have tried every possible thing out there, with this particular one you automatically solve any issue you had with heads, I use it on a Kawasaki 3hp, it fit perfectly, 4mm line snaps in without throwing it out like others, I highly recommend it

3 stars because the lid came off in the first 10 minutes, it doesn't tighten at all, if you turn it half a turn more it comes off again.. they say that if you tighten it properly it doesn't come off, I didn't see that. maybe this particular lid was defective.

Balanced weight-balanced, easy line change, durability! If combined with the metal head, it's the best!

The best available today in trimmer heads! Great savings on trimmer line as its construction prevents frequent breakage. Excellent material durability. Premium aluminum. As for the protective cover, if screwed on correctly, it won't come off at all. Worth its cost and more!