Sandflex bi metal holesaw set containing popular sizes for the engineering water sanitation and electrical installation industries the holesaws work excellently in most materials such as wood plastics non ferrous and ferrous steel including stainless steel their knockout holes allow easy removal of cores holesaws 1 of each of 16mm 58in 20mm 2532in 25mm 2in 32mm 114in 40mm 1916in and 51mm 2in arbors 3834 arbr 1130 for holesaws 14 30mm 3834 arbr 11152 for holesaws 32 210 mm also includes a pi