Feature:1. Suitable for circular incisions of wood, plastic, acrylic, gypsum board, aerated concrete, etc.2. The tool is packed in a practical transport box and is a substitute for hole saws. The diameter of the hole cutter can be adjusted continuously without tools3. The contents of the box include 2 knives equipped with HM, suitable for hardwood, such as oak, beech or wooden materials, such as plywood, particle board, plastic, acrylic, plexiglass, etc.4. Compared with other products, the circular cutters are arranged alternately with 35 degree extreme tooth shaped teeth, which can ensure very fine cutting results, partly or completely free of tears5. Depending on the application, of sharpness polished HSS knives (gypsum board, cork) or HM carbide knives (hard and plywood, MDF, acrylic, OSB, HPL) can be usedSpecification:Item Type: Adjustable Circle Hole CutterMaximum Cutting Depth: Approx. 30mm / 1.2in on one side (starting from both sides of the workpiece, so the maximum is approx. 60mm / 2.4in)Shaft Width: Approx. 9.5mm / 0.4in, suitable for vertical drills and hand drills Package List:1 x Adjustable Circle Hole Cutter1 x Hex Wrench2 x Cutter Head