have you fitted these? i love the look of these& the fact they weigh next to nothing however dude after taking the wheels off a few times i found they warped& crossthreaded. it may have been just been due to the fact that an airgun was used but i now dont trust them.& they're very soft.
im now using some nice strong nuts that i found at japfest one year& all's good look nice weigh a bit more, but are you really gona notice the difference on the unsprung weight? and they all have a internal key (saves marking your rims)to screw them on, aside from the locker & was £26 all in... after some haggling think it was the wheelmania stand?!
im sure there has been a few posts on these nuts. not being a tw*t, but nobody wants their rims falling off you may find them alright may be worth saving yourself for a show/event? hope this helps?
like these pics below but black.