The TrimmerTrap will end up twisting up the hand grips on your string trimmers. Buy extra springs now because they will wear our about once a year. In the time it takes to get one trimmer out of the TrimmerTrap you can get several out of the Extreme Series. The TrimmerTrap is OK but the Extreme series is light years ahead of it. Once you've owned both like I have you'll know what I'm talking about.