![]() ![]() Today's drills usually have a variable speed trigger, meaning that the harder you squeeze, the faster the electric motor spins the drive shaft. Today's drills offer a wide variety of features that make these tasks easier and more accurate, including high-capacity nickel-metal-hydride batteries, variable speed triggers, and even built-in levels and LED work lights.Ī trigger switch, located in the same place you might expect the trigger of a pistol, gets the drill moving. Numerous accessories can fit into in the chuck, allowing the drill to bore holes, drive screws, and sand, polish, and grind a wide variety of materials. The drill's mechanism is actually quite simple: A trigger switch activates an electric motor, which in turn drives a rotating chuck. ![]() Of course, roadside surgery is one of the more unconventional uses for power drills, which are among the most common and versatile power tools on the market. He grabbed the best surgical tool available in a snowy church parking lot in rural Idaho - a Makita cordless power drill - and bore a hole in King's skull, relieving the pressure and ultimately saving his life. Keith Sivertson made a bold but calculated decision. When paramedics finally transferred King to the helicopter, an intracranial bleed had caused the pressure in his head to rise to a critical level. But deteriorating weather conditions made it impossible for the helicopter to land near King's home, so the injured man had to be driven to Shoshone, 43 miles (69 kilometers) south of Hailey, to meet it. King suffered a severe head injury and needed to be airlifted to the nearest neurosurgeon. It was a snowy December night in 2003 when Ben King fell down a flight of stairs in his Hailey, Idaho, home. ![]()
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