Hitachi hole saws for a faster cut\n\nAll Hitachi hole saws have variable pitched teeth ( 4/6 T P I ) , which gives a better an aster cut in all types of material : stainless steel , cast iron, aluminium, copper, wood, plasterboard and plastics.\n\nTailored for your needs \n\nHitachi has developed special sets for special uses: the plumbers’ set, the electricians set, the mechanics’ set and the combination set. All current hole saws come in a handy carry case together with two mounting spindles and reducing nipples. For extra fast changing of hole saws you have the specially designed Hitachi Quick Power Lock system, allowing for quick and easy size changes