Gator digger
I've had the gator digger for a few months now...I've got the one with the dual serrated edges. It works great. Once I've pinpointed, I plunge it in then I apply leverage to one side, then I turn the blade 90 degrees, and push forward, and so on until I've made a square. It will also cut a circular plug just as easily, but the square method can be done very quickly. I've only bent it slightly one time. I've already used it several times to cut through fairly substantial roots. Great tool . You'll be glad y ou got it.