The basic equipment of every electrical engineering or model maker's workshop includes a mini drill, in the case of electrical engineering primarily for drilling printed circuit boards.

 A seemingly simple operation, drilling holes, has its own hidden pitfalls affecting the quality of the drilled holes in subsequent operations, especially soldering, and therefore has an impact on the overall result. A frequent problem when drilling holes is the need to accurately guide the drill to the axis of the position of the drilled hole, which often slips due to surface irregularities (etching, lack of etching, missing recess for the hole, surface paint irregularities, etc.) into an unwanted position and we drill the hole where we do not want it, or when the drill slides at high speeds on the surface of the board, unpleasant scratches are created, which may not only be cosmetic in nature, but thinner conductive tracks can be damaged.