With the help of the cutter Forstner (Forstner drill bit) to quickly and easily drilled to the desired depth with smooth edges. Drill Forstner 0491 SD diameter of 20 mm, is very suitable size to install furniture accessories such as "Rafiks". The drill can also be used for drilling grooves. Forstner cutter is widely used in the furniture industry, and can easily cope with wood, plastic and rubber. Mill manufactured from high speed tool steel with carbide tipped cutting, sharpened at 45 °. The blades stay sharp for a long time and do not deform in operation. Drill well cooled due to the shape of the blades, which push the chips during drilling and allow more air to cool the cutting portion. Central spearhead captures drill and provides additional accuracy. The lateral incision cutters fibers at the edge, thereafter the cutting edge cuts uniformly the material itself. This makes the hole smooth without any additional effort. Get Forstner drill bit and do the work in half the time. Features Helps to quickly and easily drill smooth blind holes of the cup type, as well as through holes, 20 mm in diameter. Tungsten carbide blades with angle 45 °, for a long time to stay sharp. It is easy to cope with the wood, plastic and rubber. 8mm shank suitable for screwdrivers, drills and routers.