Feature:1. Double Edged Hole Milling Cutter: Adjustable double edged hole milling cutter, which can cut 40‑300mm holes on the ceiling, wall and floor. The cutting depth can 19mm from one side, and the cutting depth can 30mm from both sides.2. Carbon Steel Blade: The hole opener blade is made of high quality carbon steel, which has the characteristics of cutting, stable rotation, and blade operation.3. ABS Dust Cover: ABS dust cover, with a soft silicone rubber gasket, can trap dust and debris and prevent from spreading in the and staining your furniture.4. Portable Tool: The hole opener is easy to carry and is a tool for carpenters, professionals and DIY homeowners to make holes for recessed lights, ceiling speakers and vents.5. Application: This is a hole opener for cutting plywood, gypsum board, veneer, cement board, slate, ceiling tile, etc.How to Use:(See the user manual for details)1. Open the package and take out the accessories2. Install the cutting blade on the adjustable hole opener, and then press on the dust cover3. Adjust the installed adjustable hole opener to a suitable size and send to useSpecification:Item Type: Twin Blade Hole SawMaterial: Carbon Steel + ABSSpecification: Cutting Diameter: Approx. 40-300mm / 1.6-12in Package List:1 x Adjustable Hole Milling Cutter2 x Cutting Blade1 x ABS Dust Cover1 x Adjust Hex Wrench11 x Drill1 x Pencil1 x 3 Meters Tape Measure1 x Storage Box1 x User Manual