Replacing the blade on The Lawn Mower® is as easy as 1,2,3! 

1. Hold the trimmer in front of yourself with the device facing you. 
2. Place your thumb in the middle of the blade and gently press forward to snap it out of the handle. 
3. Then, place the base of the new blade module into the empty slot on the handle of your device and gently press down to snap it in place.