If you wanna feel like air when you're trad climbing, pay the extra bucks and buy ya some of these badboys from Metolius. If you couldn't of guessed it by the product name, they are actually light...Metolius doesn't talk the talk, they walk the walk.
"They maybe pricey but are totally worth the money and do there job properly"
These curved nuts work in places that other tapers don't accept well thus there usefulness. I would definitely recommend these curved nuts to others as a secondary set of nuts so your rack has more variate. I use these all the time and they have yet to fail me or my expectations