Originally Posted by Jinks
Yup. They're so inexpensive at $10 a pair!! Here's mine, running just one on the right side. I had to file down the tab in the back, because I've got a forward facing dropout. I use it because I run a QR skewer in the back and didn't want to have to deal with getting the skewer as tight as it could possibly go every time I had to adjust the rear wheel. I've broken a couple skewers by over tightening them. It's been super easy to adjust with the chain tug.
FYI- these star tensioners work great with older horizontal dropout road conversions. I ran one for a while and it worked great. You do have to file off a tab on the back though, but it's soft metal and goes quickly. I only took it off because it was not really necessary for my bike.