Double Insulation: An electrical appliance that is double insulated does not have an earth wire fitted. The appliance is designed in such a way that the electrical parts can never come into contact with the outer casing of the device.
Variable Speed: Drills usually have a variable speed trigger, meaning that the harder you squeeze, the faster the electric motor spins the driveshaft. Cheaper models run at a single top speed, but pricier models offer between two and four maximum speed settings.
Torque Setting 19: This setting lets you control the torque or turning power of the drill driver.
Electronic 2-Speed: Electrical speed settings are found on more and more corded drills. Using its switch, you can set the drill to either screw mode (mode 1) or drill mode (mode 2). Without a mechanical speed setting, one might drill too fast for screwing and too slow for drilling.
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