They screw on pretty smooth it have a quality threads, and it work just fine. Perfect for someone who's only going to be casually using their step up rings, I am a professional photographer & I was looking same filter Ring Adapter & I order this product which is very helpful for me when I use multiple filter with my Nikon 5300 camera lens. During photo-shoot many time we have to change camera lens along with filter also, so using this ring it is very helpful for me, these rings get there job done, and don't get stuck. Please note - these are step-Up rings also have Step Down Rings total 18 rings.

These rings allow you to step up or step down the filter screw at the end of your lens, so that you can interchange filters for one size to anothe smaller of bigger one. Personally, in order to not end up with images that have circular borders, I would only work with 2mm differentials maximum on step down but if a larger filter should work OK on a smaller lens. Best advice is to try the various options with test images first in order to make sure.
In use they are fine but take care not to over tighten or cross thread when fitting.

Had cheap step up rings. Until one didn't settle on the lens and I couldn't get it off. the K&F Concept I've monitored even has grip teeth like this. and just feels secure, always removable and always stackable. I just think the price is a bit high. (I mean it's just a step up ring :D)

K&F Concept Step Up Ring for lenses, 58mm to 62mm, just under 5€ With adapter rings, only the precision of the production counts so that the threads mesh well. The ring from K&F Concept fulfills this very well. Now I can also use the filters from my 55-200mm tele. You should only note that if you leave the adapter on the lens, you may need a larger lens cap, as the smaller one no longer grips. Conclusion: Everything in order, price is right. 5 Stars

Bought for a Sigma Art Sony 24-70 and the Sony 28-135 (with Step Down), it is now permanently on my lenses. Additionally, having an ND and a polarizer on the same filter is a really nice surprise, especially at this diameter. For video recording and holding at 1/50 or 1/100 in broad daylight, this is best. A highly recommended essential.

I was given this filter by K&F concept to review, but this is my honest review based on using it for a few shoots of both photography and videography. The filter comes in a really nice plastic protective case, also included is a cleaning cloth in a pouch. The cardboard box itself is sturdy with a magnetic opening. I asked for the 77mm filter to fit my biggest lens and got some step up rings so I can use this on all my lenses and by stepping up you wont get vignetting. The filter itself feels very good quality and well built, the exposure adjustment ring allows you to choose between five stops, it feels like a fluid video head and will not move on its own. I didn't witness any colour shift, or any photo or video issues using this filter, also there was no sign of the black X some filters show when the two optics cross at their maximum point. I would definitely recommend this variable ND filter, its at a very good price point and by using step up ring for around £10 you can have this one filter work on all your lenses, that is a lot cheaper than a few sets of ND filters when your lenses have different sized filter threads. Using this on video at either 25 or 30 fps using shutter speeds of 50/1 or 60/1 this filter easily cut down the light to stop my footage being over exposed. I have added a review on YouTube and video demo, you can find this by searching youtube for this product description.

Bought for a Sigma Art Sony 24-70 and the Sony 28-135 (with Step Down), it's now permanently on my lenses. In addition, having an ND and a polarizer on the same filter is a really nice surprise, especially at this diameter. For video recording and keeping at 1/50 or 1/100 in broad daylight, this is the best.
A highly recommended essential.

Great value for money. I have the 82mm size, works great and use it with step down rings so I can use it with all my lenses.