What are swing back blades on a mower?

Swing back blades on a mower are a type of blade design that allows the blades to pivot or swing back when encountering obstacles, such as rocks or tree roots. This feature helps to prevent damage to the blade and the mower itself, as the blade can flex instead of breaking. Once the obstacle is cleared, the blade returns to its original position, ensuring continued cutting efficiency. This design is particularly useful for maintaining the longevity and performance of mowers used in rugged or uneven terrain.