[Adjustable Diameter] The adjustable diameter of the hole saw ranges from 45mm to 130mm, allowing one tool to cut various hole sizes, saving space and reducing the need for multiple tools. [Drilling] Equipped with three tri-tooth blades designed to easily cut through materials like plasterboard and cork board. The special straight serrations provide fine and clean cuts, while the three-blade design ensures smooth, burr-free results. [Easy to Use] Loosen the three central screws, adjust to the desired hole diameter, then tighten the screws securely to begin drilling. This single tool handles multiple hole sizes with ease. [Size and Packaging] Cutting Depth: 30mm, Shaft Diameter: 8.5mm, Shaft Length: 25mm, Product Diameter: 15.5cm. Package includes wrench, center drill bit, and blade. [Wide Application] Ideal for home decorators, contractors, and DIY enthusiasts. Suitable for applications such as installing recessed lights, ceiling speakers, air vents, and other hole-cutting tasks. Color: As shown in photo Material: Metal Package Contents: 1 x Hole Punching Saw Tool Kit Note: Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3cm.