With high hardness and high strength material, this opener is sturdy, wear-resistant, and not easily deformed, rust-resistant and anti-corrosive, with high stability, and can be used for a long time. Using a threaded design, this hole opener has sharp teeth, low vibration, and integrated molding, which can quickly and accurately punch holes and save time and effort. It is constructed of high speed steel material. There are 9 sizes for you to choose from. It is suitable for woodworking and workshop applications. Item Name: Hole Puncher Material: High Speed Steel Features: High Hardness, Accurate Positioning, Impact-Resistant Size Details: 35mm, Length: 7.25cm/2.85"(Approx.) 32mm, Length: 7.1cm/2.8"(Approx.) 30mm, Length: 7.1cm/2.8"(Approx.) 28mm, Length: 7.1cm/2.8"(Approx.) 25mm, Length: 7cm/2.76"(Approx.) 22mm, Length: 7cm/2.76"(Approx.) 20mm, Length: 7cm/2.76"(Approx.) 18mm, Length: 7cm/2.76"(Approx.) 16mm, Length: 7cm/2.76"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Hole Puncher