Features Centre drill made of alloy: equipped with a central drill made of alloy steel with high strength and good toughness, which ensures stable operation. INCUTING SAW TOOTH: These hole cutters have a cutting saw tooth, with low operating vibration, high efficiency and fast and balanced operation. Applicable material: these hole saws can be used for drilling and cutting wood, plywood, plastic, plasterboard, thin metal, etc., and are very practical. Hole saw sizes: including 5 pieces hole saws with different specifications of 64mm, 76mm, 89mm, 102mm and 127mm, which meet different drilling requirements. Other accessories: this kit contains 5 hole saws, an extension rod, a gasket and an Allen key, easy to install and replace, practical and practical. Specification: Item Type:Hole Saw Set Material: alloy steel, high-speed steel. Specification of Hole Saw: 64 mm / 2.5 inches. 76 mm / 3 inches. 89 mm / 3.5 inches. 102 mm / 4 inches. 127mm/5" Package list: 1 x connecting rod. 1 x seal. 1 x Allen key. 5 x hole saws. 1 x storage box Package List 1 x Connecting Rod 1 x Gasket 1 x Hex Wrench 5 x Hole Saws 1 x Storage Box