Sturdy enough so far, but I am only 3-weeks new to using landmines at all since the Gym always had alternatives. There is just a tiny bit of wiggle in the plates, but no real movement. That said, I just ordered the two landmines below in hopes I can figure out a way to mount one (or both for a high and low mount) to the DB rack and free up those 35's. I'll just return or re-sell whatever I don't use.

https://www.amazon.com/gp/product/B07G29T7VW
https://www.amazon.com/gp/product/B01077P1W2

I use one and it works fine but will be selling because I found this one that attaches to my rack. That way I don't have to dedicate weights every time I want to use.

https://www.amazon.com/Yes4All-Deluxe-T-Bar-Row-Platform/dp/B01077P1W2/ref=sxin_7?ascsubtag=amzn1.osa.79789e9a-c201-467f-8327-6b21d648eb20.ATVPDKIKX0DER.en_US&creativeASIN=B01077P1W2&cv_ct_cx=landmine&cv_ct_id=amzn1.osa.79789e9a-c201-467f-8327-6b21d648eb20.ATVPDKIKX0DER.en_US&cv_ct_pg=search&cv_ct_wn=osp-single-source&dchild=1&keywords=landmine&linkCode=oas&pd_rd_i=B01077P1W2&pd_rd_r=86588815-b6c2-44d8-82db-bada57ca83cd&pd_rd_w=tqLhU&pd_rd_wg=8ngca&pf_rd_p=239b7e46-2801-4de5-be76-268606e8ded2&pf_rd_r=ZK6T0NM1S2A82JJQNYTN&qid=1593776240&sr=1-3-72d6bf18-a4db-4490-a794-9cd9552ac58d&tag=barbend0d-20