Measure the length of your Weed Eater with a tape measure from the curve of the shaft near the trimmer head to the middle of the engine.
Locate two studs on your garage wall as far apart as the measurement of your Weed Eater.
Measure up from the floor 5 feet on each stud and mark the wall with a pencil. This is the height you are mounting your hooks, which keeps the trimmer out of reach of smaller children.
Drill a pilot hole in each stud with a drill bit slightly smaller in diameter than the utility hook's screw.
Position the screw end of the utility hook into the pilot hole and turn the hook clockwise to screw it into the stud. Repeat for the opposite hook.
Set the trimmer over the wall hooks with the engine close to one and the trimmer head pointing down. The trimmer will sit between the wall and the upright portion of the hook.