To bury posts you want straight narrow holes in the ground. Traditional post hole diggers tend to flare the hole at the top as the hole deepens because the handles must swing out further. This clever improved design from Fiskars crosses the handles so they don’t swing out as far in the hole, yet they still bite as the hole gets deeper. The narrower the hole, the less dirt to remove, the less work. I found I could get a tight cylindrical hole almost one foot deeper with this tool. Also, this design prevents that dreaded knuckle-banger when the handles crash into each other on the closing stroke, which alone makes it worth using.