This is an Eskimo Gas Drill OEM Product. It has a 7/8" input/output shaft size. Gives an additional 12" of hole depth, but also elevates the head to a level that some people may find uncomfortable. A bit pricey for what it is, but others suitable extensions have a similar price.
I have a Predator tm. HF's signature heavy duty drill bit comes with a 6" bit and this extension is perfect for both. Our soil on the peninsula is very sandy, perfect for digging, so I really can't say how it will hold up in rough conditions, but it works absolutely fine for me. I am not affiliated with this or any other product. I did not receive anything. for my rating. I recommend this product.
Solid product. Does exactly what it should. Unfortunately, they chose to send the extension with a nut and bolt into the extension's inlet hole. I spent 30 minutes banging on my new extension because I couldn't use it without a nut and bolt. The company should screw the nut and bolt together when shipping this way.