Push-N-Load Replacement Trimmer Blades by Shakespeare are high performance trimmer blades modified to outperform other residential blades. Scientifically engineered to be more durable than other residential trimmer blades. Impact modifiers are embedded within the nylon to keep your blades from breaking down as often as other products on the market. These blades are easily loaded 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.