Mower blade

Mower blades should be sharp, but not as sharp as a razor’s edge.

You should be able to touch the blade with your hand without getting cut. the popular belief, a lawn mower blade with a razor sharp edge will cut grass better. In fact, an edge that is that sharp has the tendency to roll over, which can cause blades to get chipped. Additionally, lawn mower blades that are too sharp get duller, faster resulting in the need to sharpen more frequently and a shorter blade life.