Complex sentence: Because the cutting edges are so small, they can be touched when spinning by a finger without cutting the skin, which flexes out of the way, although it would not be safe to pinch or grip them from two sides.
Split into simpler sentences: Because the cutting edges are so small, they can be touched when spinning by a finger without cutting the skin, which flexes out of the way. Although it would not be safe to pinch or grip them from two sides.