Heavy- woodworking construction Multi-functions, and practical Having adjustable two blades on both side of the measure-bars Adjustable Plane type design Comes with Hex Key and Center Drill Bit 2 Changeable Center bits for thinner or thicker materials freely Perfect for Installing Locks, Knobs in Doors and Cabinets or Drilling Larger Diameter Holes Through Desks Etc Cuts Steel, Stainless Steel, Copper, Brass, Aluminum, Fiberglass, Formica And Other Laminates In Seconds Adjustable Range:40-300mm Optimal Rotational Speed:280~300r/min colour:black Material:metal Size:L*W/330*245mm/12.99*9.64 inch Package Contents: 1 * Adjustable Circle Hole Saw Drill 1 * Center Drill Bit 1 * Hex Key Only the above package content, other products are not included. Note: Light 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.