I have used these three times now and two of them have broken, firing nice little shards of sharp blue plastic into my tyre housing. Just what I wanted. Shockingly badly designed, so that they make the work of removing or replacing a tyre into a sweaty, sweary, knuckle-scraping nightmare instead of a five minute repair. Tips break easily, and the hooks are so badly designed that you need to bend the levers almost in half to get them to engage with a spoke, which can't be good for the spoke either. They pop out at will, and I have pinched and punctured two tubes while repairing punctures - never having done this before in my entire bicycle-owning life. Which is longer than I'd like to admit. Simply horrible little tools which are not only not fit for purpose, but which are fit for absolutely nothing, apart from dropping into the nearest bin. Got them in a toolkit with SuperPatches, which are also a waste of money. Not my finest hour on Amazon!