1、HOLE SAW SIZES: Including 5pcs hole saws with different specifications of 64mm 76mm 89mm 102mm 127mm, meeting different drilling needs. 2、APPLICABLE MATERIAL: These hole saws can be used for drilling and cutting wood, plywood, plastic, gypsum board, thin metal, etc., with strong practicality. 3、ALLOY CENTRAL DRILL: Equipped with a central drill bit, made of alloy steel, with high strength and good toughness, ensuring stable operation. 4、INCISIVE SAWTOOTH: These hole cutters have incisive sawtooth, with low operating vibration, high efficiency, ensure fast and balanced operation. 5、OTHER ACCESSORIES: This kit includes 5 hole saws, an extension rod, a gasket, and a hex wrench, easy to install and replace, convenient and practical. 1 x Connecting Rod1 x Gasket1 x Hex Wrench5 x Hole Saws1 x Storage Box Item Type: Hole Saw KitMaterial: Alloy Steel, High Speed SteelHole Saw Specification: 64mm / 2.5in76mm / 3in89mm / 3.5in102mm / 4in127mm / 5in