I trust K&F and like their products, especially their filters. It makes sense for them to also sell a lens cap set. While this isn't the cheapest lens cap set, it's still cheaper than buying major brand lens caps. The extra accessories are a nice addition to round out the price, particularly the individually wrapped and sealed microfiber cleaning cloths. I'm not a big fan of the lens cap tether, but it's there if you like it. I have yet to lose a 77mm lens cap (knock on wood) but when I lost my 82mm lens cap I remember feeling terrible waiting for the replacement cap as my lens lens is now unprotected was. I've been looking at my lenses and 77mm is my favorite thread size so I decided to get a set as a spare. These lens caps work well, snap in and out easily, and fit the threads securely. I've had some third-party lens caps that won't snap or don't fit the threads properly and can sometimes come loose on their own, but these K&F ones work just fine. There's a large area to pinch in too, so it should work well for hands of all sizes. that won't snap or don't fit the threads properly and can sometimes come loose on their own, but these from K&F work just fine. There's a large area to pinch in too, so it should work well for hands of all sizes. that won't snap or don't fit the threads properly and can sometimes come loose on their own, but these from K&F work just fine. There's a large area to pinch in too, so it should work well for hands of all sizes.