to cut steel ,metal,wood,plasticetc.. top quality tunsgen tipped for fast accurate cutting METAL STEEL /WOOD/ PLASTIC CUTTING HOLE ... SAWTOP QUALITY TUNGSTEN TIPPED FOR FAST ACCURATE CUTTINGTO CUT STEEL, WOOD, PLASTIC, ETCDRILL TO25MM DEEP Comes with 9 Centre Dirll ... the central drill bits and alan keys with plastic case.(pictutre follow) wood ,plastic, metal,tungsten cutting hole saws with case