Variable pitch holesaws in bi-metal construction. Hardened HSS teeth, flexible high carbon steel backing. Used for cast iron, stainless and structural steel, bronze, copper, PVC, alloyed and non-alloyed aluminium, acrylic and wood. Contents: 19, 22, 29, 38, 44 and 57mm holesaws. Includes 2 arbors and mandrel adaptor. Variable pitch holesaws in bi-metal construction. Hardened HSS teeth, flexible high carbon steel backing. Used for cast iron, stainless and structural steel, bronze, copper, PVC, alloyed and non-alloyed aluminium, acrylic and wood. Contents: 19, 22, 29, 38, 44 and 57mm holesaws. Includes 2 arbors and mandrel adaptor.