Useful tools for easy and fast drilling of thin plate in various material. Made of high quality material, very durable. Specifications: Material: Carbon Steel Hole Saw Type: 19mm / 22mm / 29mm / 32mm / 38mm / 44mm / 51mm / 64mm / 76mm / 89mm / 102mm / 127mm Arbor Length: 4cm / 9cm Package Size: 21 * 14.5 * 4cm / 8.27 * 5.71 * 1.57in Package Weight: 930g / 32.81oz Package List: 12 * Hole Saws 2 * Arbors 1 * Installation Plate 1 * Wrench