Background Cardiac implantable electric devices are commonly used to treat heart failure. Little is known about temporal and geographic variation in use of cardiac resynchronization therapy (CRT) devices in usual care settings.
A hammer drill, also known as a rotary hammer, roto-drill or hammering drill, (see also rotary drill) is a rotary drill with a hammering action. The hammering action provides a short, rapid hammer thrust to pulverize relatively brittle material and provide quicker drilling with less effort.
Rockwell, makers of the JawHorse, announced its new H3 Hammer Drill at this January's International Builders' Show. The H3 is a 12-volt rotary hammer that is about the size of a standard 18-volt drill. (It is engineered as a rotary hammer, but for some reason Rockwell calls it a hammer drill). In my experience, 12-volt drills are good enough for adjusting hinges and other light-duty tasks, none of which include drilling through concrete. I had my doubts about this one.