Grass trimmers are handy when you need to cut grass or weeds around objects in your yard. Using a lawn mower around a deck or the decorative brick surrounding your garden bed is nearly impossible because you can't maneuver it close enough. Grass trimmers, however, are lightweight and easy to manipulate around hard-to-reach areas. You can buy either electric or gas powered grass trimmers but they both are used the same way.
Wear a pair of jeans, socks and shoes when you are using a grass trimmer. It is also recommended that you wear protective glasses over your eyes because bits of the cutting string could break off and injure you.
Start your grass trimmer in the area you are going to be trimming. If you have a gas powered trimmer, there is a starting cord you will need to pull fast and hard while squeezing the trigger button. If your grass trimmer is electric, you will need to plug it into an electrical socket and push the starting button.
Hold the grass trimmer parallel to the ground. Lower it until it is cutting even with the mowed portion of the grass. Slowly move it back and forth along the object you are trimming around. Take care not to allow the cutting strings to hit the object repeatedly.
Turn off the grass trimmer when you have completed your job. If you have a gas powered trimmer simply release the trigger button. If you have an electric trimmer, either turn off the switch or unplug the cord.