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.
Hammers Aren't Just for Nails: 101 Ways to Use a Rip Hammer. A rip hammer is an all around utility tool capable of dozens of tasks besides driving nails. Here are nine, including demolition, chopping, measuring, bending, digging and others. Overview: Hammers aren't just for nails anymore.