The good drilling of a wooden piece obeys several preconditions : the good fixation of the object to be drilled, the good condition of the bit (sharpening, geometry, state of the shank), its perfect guidance, without forgetting the quality of the wood whose fibers should be as straight as possible and in the correct direction. The expert eye of this worker from the Vilac factory allows the drill to be oriented as best as possible to direct it precisely on the place to be drilled, which has been marked beforehand with a point.