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Rotary hammers are used for doweling and drilling through holes in concrete and masonry walls.In place of a special clutch, it uses a piston mechanism. To deliver more powerful hammer blow which make it possible to drill bigger holes faster.A rotary hammer machine is a power tool that is used in heavy-duty works as a drilling and carving hard material.This power tool is designed to chip or break up concrete.It is mainly used for demolition of hard surfaces, drilling holes, placing pins and anchor bolts.This tool is used in the manufacturing industry and construction industry.