That is a KRA4109 it could be an A or b model, discontinued last list was $1895.00, if you pull out the bottom drawer past the edge of the box there might be a sticker on the bottom of the box or it's engraved on the back of the box.
Listen to the Toolfreak, I'm a Snap-on Franchisee & have sold several of the CTS561's & customers love them including me, it's my most used tool around the house & @ the first of '08 there will be a model with a clutch & one that is a 1/4" impact.
To all whom have commented:
No store has these on their shelf as we are new to the market that is why we are advertising on the Speed channel. As to the durability there isn't a problem unless excess force is used to remove a socket & it's obvious there is a stop when turning (we do have a...