Push-N-Load Replacement Trimmer Blades are high-performance trimmer blades modified to outperform other residential blades and scientifically engineered to be more durable than other residential trimmer blades. Impact modifiers are embedded within the nylon to protect your residential grade blades from breaking down. You can easily load these blades into the trimmer head with a push of a button. That means cutting more with less downtime to get the job done faster, leaving you more time to do the things you want.