high-quality single-flute auger with specially ground roof tip and very stable spiral design, high-quality coating for minimal friction, suitable for low-splinter drilling of all softwoods on prefabrication systems, very good fit of dowels due to minus tolerance of the drill diameter, particularly suitable for drilling planed or finished laminated beams due to the special head geometry, entry and exit of the hole significantly less prone to splintering than conventional augers, only suitable for use on prefabrication systems, no freehand operation possible