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The thread drilled by the drill is very reliable. Even if you do not use an electric drill, you can easily screw in the screws just by hand, saving a lot of work time.It uses High-Speed Steel 6542 and 4341 material, higher hardness, more durable, can be used for drilling the steel plate even the 2mm 304 steel plate.
Applicable to some types of carbon steel and ordinary steel, copper, and aluminum-magnesium alloy drilling hole. Six different sizes of drill bits can help you get different sized holes.