I was a bit unsure of these but they are great. It's definitely nice to easily move my c-stands around, instead of constantly having to pick them up. It saves time and energy from taking the sandbag off, moving the stand, putting the sand bag back on, or trying to move the stand with the sandbag on it. I bought several of these and they easily fit my Matthews C-Stands. I definitely recommend, the quality is great, especially since there really aren't any other companies making these for c-stands. If you're thinking of buying some, just buy them, you won't regret it.