[Adjustable Diameter]The adjustable diameter of the punching saw is from 45mm to 130mm, only one tool is needed to cut holes of different diameters, and space. [Precision Clean Drilling]Three tri-tooth blades can easily saw through plasterboard and cork board, and ensure fine and clean cutting with its special straight serrations. Three-blade design ensures smooth, burr-free cuts. [Easy to Use]Loosen the middle 3 screws, then adjust the diameter of the desired hole, and finally tighten the 3 screws to start drilling. Round holes of different sizes and diameters require only one drill. [Size and Packaging]Cutting Depth: 30mm, Shaft Diameter: 8.5mm, Shaft Length: 25mm, Product Diameter: 15.5cm. Package contains wrench, center drill and blade. [Wide Application]For carpenters, home decorators, contractors, professionals and DIY owners, it is a very practical tool for recessed lights, ceiling speakers, air vents and other hole cutting applications. Colour:Photo Color Material:Metal Package Contents: 1 x Punching Saw Tool kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.