Features Multiple Specifications: The set is complete with accessories, including 10 different sizes of metal hole saws with twist drill and positioning drill, suitable for various drilling projects. High Speed Steel Material: This hole saw kit is made of high quality high speed steel material, which has good corrosion and heat resistance, high hardness and long service life. Wide Range of Applications: The series of hole saws have sharp teeth, which are perfect for making holes in metal, wood, PVC board, plastic and gypsum board with high efficiency and good precision. Fast Cutting Speed: The hole saw set has alternating tooth sizes to improve performance and cut faster and longer on wood, metal and plastic materials. Comes With Storage Box: Comes with a practical and portable storage box, which allows you to keep the drill hole saw organized and easy to use when you need it. Specification: Item Type: Hole Saw Kit Material: High speed steel Hole Opener Specifications:  Approx. 19mm / 0.7in 22mm / 0.9in 29mm / 1.1in 35mm / 1.4in 38mm / 1.5in 44mm / 1.7in 51mm / 2in 54mm / 2.1in 57mm / 2.2in 64mm / 2.5in Package List: 10 x Metal Hole Saw 2 x Twist Drill(A2 and A4) 1 x Positioning Drill 2 x Hex Wrench 1 x Thread Converter 1 x Storage Box Note: Pay attention to correct operation. Package List 10 x Metal Hole Saw 2 x Twist Drill(A2 and A4) 1 x Positioning Drill 2 x Hex Wrench 1 x Thread Converter 1 x Storage Box