This is the one that I have, it's a lot more beaten up now, though! I've had it for around 5 years already and use it often, works great with a lightweight cordless drill. The shovel one looks like it'd be really good too. I just had one of those little plunger thingies before, only worked in the softest soil. Even in my good beds by fall bulb planting time the soil is pretty hard, hated the plunger thingie!
https://www.amazon.com/dp/B0015Z3OZ2/
