Apart from the lack of instructions, especially regarding lubrication, it is good. It has removed 350 roots so far, it doesn't go very deep but as much as needed. I am buying again because it ultimately destroyed 2 lawnmowers, at first I thought it was a coincidence but a second one...??

For digging in the vineyard between the roots, it is just what you need. It has two screws for lubricating (valve oil) the group, it doesn't require much effort

In the product image, there are two versions... the first one shows that the blades have screws, so they can be changed, and the second one shows that they have clips. Although I asked the seller if there are replacement blades, he told me that they are Nakayama and if needed, which is unlikely as he said, we will find them...

Unfortunately, in reality, the second version is true, it has clips and not screws... the discs with the blades are two, one on the left and one on the right, and they are connected to the axis with pins, with a very large gap that I suspect causes imbalance, and I assume that's why the router came stuck without rotating. I also sent an email to Nakayama because, on top of everything, it doesn't even have a simple manual that states how and what lubricant to use, but I received no response.

I will take it back to the store in the hope that they will replace it... if they do replace it and I use it, I will provide feedback because I want to be objective...

Okay, it's good for digging around the vines (vineyard). When the weeds have hardened, it gets stuck

It does a good job on plowed field and seems to have a sturdy construction. I put it on a kraft 52cc 3 hp and it works very comfortably.

For digging around new crops (annual plants) it is just what you need... if you don't push it to the extreme turns, I believe it will endure... it did a 3-hour job (100 small trees, perimeter) without complaint... except for the complete absence of instructions for use / assembly and while I was looking for what it takes in its gears (it has two screws, one to put in and one to take out liquid) I noticed that it was dry... I put 90 gear oil as it seemed the most logical to me... I don't know what will happen when someone works it completely dry... (I imagine) ... whoever knows what should be put in, please comment below... because from the dealership... no... anyway, even if it breaks now, it paid off for me... from digging with my hands 3 acres of property with trees...