They render your charging and carrying case useless, as there is no way to keep them on and use the case. I ordered these for my 81 year old aunt. Comodidad: Leí que varios decían que no eran muy cómodos, pero en lo personal a pesar que en un inicio sentí que apretaban un poquito, a los minutos se me olvido, por eso yo difiero de eso, me gustaron para usarlos varias horas. And that means there is a little bit more to worry about when it comes to durability. Hold bike pedal on wall, pencil where wall pedal in full up rotation touches wall. Unfortunately, this early progress failed to continue due to economic downturns and a lack of external investment. What a brilliant stylus! The cases i bought just arrived today so i cant be 100% sure, but so far I think it?s a pretty good deal for the price! Comfortable, warm with a solid shoe-like soul. I like these,they actually are a left and right.