... 3,cutting wood,steel 4:size14~380mm HSS BIMETAL HOLE SAW*HSS M42 teeth electron welded to a high ... will extend the life of your hole saw by 500%.*Our HSS Bimetal hole saws with HSS teeth are rugged ... some other machines, which have rotating spindles.*Our HSS Bimetal hole saws are recommended for cutting steel, cast iron pipe, ... copper, brass, stainless steel, wood and plastic, etc.Bimetal hole saw size: