According to the manufacturer, it's an impact drill:

http://www.hitachi-koki.com/powertools/products/drill/fdv16vb2/fdv16vb2.html

There's a button near the chuck to engage/disengage the impact mechanism. Lowes markets this as a hammer drill. There is no forward hammer motion, it's all rotary action. It is an impact *drill*, not an impact *driver*. I don't think it would do a very good job removing torqued-down lug-nuts, for instance, it just doesn't have the torque.

Last edited by SteveFehr; 12/17/07 01:49 PM.