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The cordless electric drill is a drilling tool that uses electricity as power, the working principle is t DC motor rotates. After being decelerated by the planetary reduction mechanism, it drives the drill chuck to rotate to drive the screwdriver bit or drill head. It can be used for screws, wood screws, and self-propelled drills. The screwing-in and screwing-out operations of tapping screws can also be used for drilling various metals and woods. According to the voltage of the rechargeable battery, there are 12V, 18V, 21V, 24V, 26V, 48V and other series.
The impact drill is a kind of electric tool that can both rotate and impact. It will produce impact rotation when it's working. It can be installed on bricks, concrete, blocks, tiles, etc. Drilling on brittle materials is especially suitable for drilling various indoor and outdoor decorative materials and composite materials. If you choose an impact drill, generally it only uses the drilling function for a single material working surface; when it's working for composite materials, you can use both impact and rotation functions at the same time.
