First, I don’t own this specific model, but this is most like the one I do own. The one I inherited three years ago was referred to as a pry/spud bar. I’ll be referring to it as a spud bar in this review. I wouldn’t recommend trying to dig a post hole with just a spud bar, I imagine it’s possible, but it’ll take you awhile and you’ll look silly. If you’re doing any kind of landscaping or burying any kind of post that isn’t supposed to be moving for a good deal of time, I’d make sure you have a spud bar at your disposal.
So what’s the purpose of a spud bar you ask? Well, if you’re digging in an area that has a fair amount of clay, your typical post hole digger is going to struggle to break up the clay to remove from the hole. But, if you force the wedged end of the spud bar into that clay a couple times and pry, should be a lot easier to remove the clay from the hole.
I’ve also use the spud bar to help clear gravel, roots, heck, I’ve even used it to help clear some concrete. My personal favorite use was when I used mine to pry/roll the ~300 lb. odd shaped rock to a new location in my back yard, friends still don’t believe I moved it myself. The flat round end allows the spud bar to be utilized in coordination with a mallet or sledge hammer to help wedge/drive it wherever you intend.
When it comes down to it, it’s just a shaped steel bar, a simple tool that if utilized correctly, can quite effective.