You may think that you only need one finger, and that may be true. In fact, these tools come in handy when you need to "smooth out" corners or trim excess silicone and get everything clean and even. You can press on the excess silicone and remove the excess before it dries. It is an elastic material that washes well with water. It also helped to get the old silicone out of the shower, it could be pulled out with a black tool but I needed another metal tool to get at the stuff that wasn't coming off. Would I buy again? May be. But all you really need to do it neatly is GOOD LACQUER TAPE, cut it.
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