I bought 3 x 10 a year to install new LED recessed lights to replace old ones. Our cans didn't have the mount we needed so we bought them instead of replacing all the cans. Two packages matched the description. A pack of 10 was short, so you had to guess the placement. It didn't attach to the bottom of the can, it just had a screw. We used them for easier access to light sources as some of them would be very difficult with our vaulted ceilings. For me it's already quite expensive for what they are so I think everything should have been as described.
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