Set of core bits (cutter) is used for drilling of through holes with a diameter of 19 to 127 mm, in the wood and its derivatives, as well as in plastics and plasterboard. With this kit you can easily drill your desired size: a socket, door locks, or the passages for communication. The kit includes a set of two holders: holder with a drill guide and a support base for the crown diameter of 32127 mm; Holder without centering drills for crowns 19, 22, 29 mm. In a set of 12 crown cutters made from high quality tool steel. With this cutting edge will not deform and remains sharp for a long time. Perform one propyl, and you feel as a quality tool in your hands. Just cut quality is increased, thanks to the step, and the separation of teeth. Pilot drill does not give the crown to go away and allows you to make smooth controlled opening. All the bits are packed in a plastic case with a latch, are always in place and not lost at work. You will easily find a place for the storage of the case unnecessarily his compact size. repair do with a set of bits of wood easily and quickly. Features Easy to cut holes in wood, plastic, drywall, thanks to the special angles of inclination and the separation of teeth. You get a smooth hole through the drill guide. The cutting edge withstands high loads without deformation, is made of solid tool steel. Crowns are always at hand because stored in a sturdy carrying case small size.