I've always had a little trouble with the Losmandy tripod knobs. I find them hard to get tight enough, hard to loosen once they're tight, and hard to use with mittens when it's cold outside like after a late night of observing. Enter the tripod levers! These things are great. They provide more leverage, making it easy to get the tripod lets fixed in place while still being easy to loosen up at the end of the night. And they have a ratchet feature that allows you to position the levers where they won't catch on anything. Finally, gloves are no problem with these levers. For me they're a must have accessory.