1. Hole saw with quality production technology: The adjustable hole saw cutting head is made of quality hard alloy material, and the tungsten steel is heattreated to make the head sharper and stronger, more durable, less prone to damage, and faster to drill; adjustable hole saw dial. The stamping process ensures the scale is more precise and clear, with wearresistant properties. 2. The adjustable hole saw is easy to install: Our adjustable hole saw cutting set is simple to install. Just attach the drill bit, adjust the cutting head to the desired size, and tighten the locking screw, then connect your electric drill to punch holes without needing further size adjustments. 3. Adjustable hole saw made of materials: The wooddrilling hole saw tools are crafted from quality, hardness metal, making them stronger and more durable. The hole saw kit includes 1 turntable, 1 dial, 1 drill bit, 3 screws, 1 large wrench, 1 small wrench, and 6 cutting heads. Three replacement cutting heads allow for replacing damaged ones for extended use. 4. Adjustable hole saw: The adjustable hole saw tool can cut round holes with a diameter range of 1.8 5 inches. When adjustment is needed, simply loosen the three screws on the adjustable hole cutter head and rotate the adjustment dial of the hole saw set to modify the size. Once the correct size is set, tighten the screws, and a sized round hole can be cut.