In article ,
Ian White GM3SEK wrote:

Probably... the "2 kilogram" drills look like a stretched version of a
normal pistol-grip drill, with a horizontal motor. For example:
http://tinyurl.com/33zcrr

Ian-

Your first example is the one I was looking at.

Neither store had anything like a Ground Rod adapter or half inch socket
adapter in stock. I searched the web and was not able to find a ground
rod adapter compatible with SDS+. I found one comment that such an
adapter would not be sufficiently strong to withstand the forces
required to drive a ground rod. There were several references to an
SDS-Max adapter, but that may not be compatible with SDS+. Yes, the
prices were high!

I did find references to a half inch socket adapter. It is a Hitachi
"1/2 inch Chemical Anchor Adapter", Code No. 303044.

Fred
K4DII