... ,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 ... teeth are rugged cutting tools designed to cut accurate holes in machinable materials up to 38mm or 44mm ... copper, brass, stainless steel, wood and plastic, etc.Bimetal hole saw size: