Black and White Screw Point Self Feed Wood Auger Drill Bits

Impact drills can be used for natural stone or concrete. They are universal, because they can use either the "single drill" mode or the "impact drill" mode, so they are basic electric tools worth choosing for professionals and hands-on workers. The electric hammer works by rotation and hammering. The single hammering force is very high and has a hammering frequency of 1000 to 3000 per minute, which can produce significant force.

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