Function: 1. Suitable for round cuts in wood, plastic, acrylic, drywall, aerated concrete, etc. 2. Tool packed in a practical transport box, replaces hole saws. The diameter of the hole cutter can be adjusted continuously without tools 3. The contents of the box include 2 knives equipped with HM, suitable for hard woods such as oak, beech or wooden materials such as plywood, chipboard, plastic, acrylic, plexiglass, etc. 4. Compared with other products, the cutting discs are staggered with teeth with an extreme 35 degree angle, which can provide highly accurate cutting results, partially or completely tear-free 5. Depending on the application, polished HSS knives (gypsum boards, cork) or HM carbide knives (hard and plywood, MDF, acrylic, OSB, HPL) can be used Specification: Item Type: Adjustable Round Hole Maker Maximum cutting depth: approx. 30 mm / 1.2 inch on one side (starting from both sides of the workpiece, so max is approx. 60mm / 2.4in) Shaft Width: Approx. 9.5mm / 0.4in, suitable for vertical drills and hand drills Package List: 1 x Adjustable Round Hole Maker 1 x hex key 2 x cutting head