Spyder Tarantula carbide-tipped, 5-holesaw kit offers cuts up to 10x faster than standard bi-metal hole saws. Features Rapid Core Eject Arbor system to quickly enlarge existing hole diameters, cut at an angle and remove cores without prying. Cuts various materials including including steel, stainless steel, nail-embedded wood and PVC/plastic. Cuts Aluminium, Fibre Cement Board, Fibreglass, Non-Ferrous Metals, Mineral Fibre, Plastics, Steel, Stainless Steel, Wood & Wood with Nails Steel Slotted Barrel to Aid Removal of Debris 25mm - 50mm Dia. Holesaws For Use with 3-Jaw Chuck Machines on Rotary Action Cuts Aluminium, Fibre Cement Board, Fibreglass, Non-Ferrous Metals, Mineral Fibre, Plastics, Steel, Stainless Steel, Wood & Wood with Nails Steel Slotted Barrel to Aid Removal of Debris 25mm - 50mm Dia. Holesaws For Use with 3-Jaw Chuck Machines on Rotary Action