... ,cutting wood,steel 4:size14~380mm HSS BIMETAL HOLE SAW*HSS M42 teeth electron welded to a high alloy ... a cooling lubricant will extend the life of your hole saw by 500%.*Our HSS Bimetal hole saws with HSS ... size from 14mm to 210mm in diameter, they can be used in portable electric tools, air tools, drill press, lathes, ... copper, brass, stainless steel, wood and plastic, etc.Bimetal hole saw size: