A device for assisting an operator of a boring instrument having a penetrating element for penetration of a work surface comprising; is disclosed that includes a retention member adapted to be connected to a rotating element of a boring instrument having a cutting element wherein retention member is adapted to receive a laser, and the retention in the form of a sleeve with a tubular profile and adapted to be attached on a rotating element of the boring instrument and wherein the laser is oriented to direct a beam in a direction that is parallel with the direction of orientation of the penetrating element.