Felting needles are sharp because they have to be, and the two fingers holding the wool are the two that get hit. These go over your thumb and index finger and take the hit instead. Two of them, thick leather, shaped to fit an adult thumb and index finger. Most people wear one on each of those two fingers on the hand holding the wool. They're not bulky enough to change how you grip, which is the reason most people stop wearing the alternatives after ten minutes.
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