I ordered this 2-pack of K&F Concept 67-82mm Step-Up Ring Adapters to use my 82mm filters on 67mm diameter lenses.Whenever I purchase filters, I always get 82mm so that they will fit my largest diameter lenses. Then, if I am using a smaller diameter lens, I use step-up rings that allow you to attach a large diameter filter to a smaller diameter lens. There are some issues associated with this strategy, however. First, not all step-up rings are created equally. Some are poorly machined and, once attached to your lens and/or filter, are nearly impossible to remove. You may find that the only way to get them off is with a filter wrench, and no one really wants to have to carry a filter wrench in their photo bag. Second, if you are using more than one step-up ring (i.e., 58-62 + 62-67 + 67-72 + 72-22 + 77-82) you may find that you will get serious vignetting, especially on wide angle lenses. You can eliminate the first problem by sticking with better quality step-up rings. You can eliminate the second problem by having just one ring that gets you from your lens diameter to your filter diameter.I've purchased a lot of K&F Concept products in the past, and I have to say that over the years I have seen a major quality improvement. Many of K&F Concepts products are right up there with OEM quality, and this step-up ring is an example. The ring is machined very nicely. The ring screws into my lenses smoothly. It can be tightened securely but remains easy to remove. The same can be said for the threads that the filter screws into. The filter is thin enough to prevent vignetting but holds its shape and does not flex.