The Premium Mulching Blade is a fantastic blade for weekly mowing and gives you the runtime and cut quality you expect from a high-end lawn mower. This all steel blade is specifically designed for the EGO POWER+ Select Cut™ 52cm Self-Propelled Lawn Mower. The Upper Blade is the 2nd blade of the multi-blade system. This blade slices the grass the lower blade sucks up to enhance the cutting performance. The EGO Select Cut™ Multi-Blade System is EGO’s solution to replacing premium petrol lawn mowers for good. EGO parts and accessories are designed specifically for your EGO POWER+ Lawn Mower and offer the highest quality and performance. (Can only be used with the 52cm Select Cut Mower, LM2135E-SP)