With the Bahco 3830-30-VIP Sandflex bi-metal hole saw, you cut clean and accurate 30 mm holes through wood, plastic, steel, and stainless steel with confidence. The durable bi-metal construction containing 8% cobalt paired with a 4/6 teeth per inch variable pitch delivers high wear resistance and smooth, controlled cutting up to a depth of 38 mm. Built-in side knockout slots allow you to eject the cut core quickly and easily after each cut, keeping your installation and fabrication jobs moving without interruptions.