Cordless power drill are widely used more now then their cousin the corded drill, due to their convenience, strength and durability and now lighter weight. A drill is fitted with a cutting tool attachment or driving tool attachment, usually a drill bit or driver bit, used for boring holes in various materials or fastening various materials together with the use of fasteners. The attachment is gripped by a chuck at one end of the drill and rotated while pressed against the target material. A rechargeable and removable battery is used for the tools power source. To prolong the batteries life, they stop charging when the battery charge reaches full level, before the battery begins to overheat. Batteries range in voltage from 4 to 24 volts and the higher the volts, the stronger the tool. Drills are commonly used in woodworking, metalworking, construction and do-it-yourself projects. Specially designed drills are also used in medicine, space missions and other applications. Drills are available with a wide variety of performance characteristics, such as power and capacity.
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