On Thu, 16 Mar 2006 19:08:27 GMT, Guy King
wrote:

Out of interest, does anyone know how the hammerstop works on these
little pneumatic drills?

On some of the cheap ones there isn't really a "hammer stop", there's
just a sliding block that wedges the drill bit in the forward position.
The hammer is still flying back and forth, but it doesn't contact the
drill bit any more. Even when not "hammering", these still have a lot of
vibration.