The vibrator didn't last through one load of concrete, though it may have been my fault. First of all the button to lock the trigger on quit working early on, actually it wouldn't release and I had to unplug the vibrator. But the next problem may have been my fault for not for not getting the wand screwed on tight enough. I had it attached to a backpack, vibrating a wall, until the wand detached, tearing up the drive shaft in the process.