small centering tip, pre-cutter, and 2 main cutting edges on the hinge drill, version WS for uncoated softwoods, Bormax® geometry for veneered panels and conditionally for KS-coated chipboards or MDF, HM in KS coating without issues, all versions are only conditionally suitable for freehand use, the guide sleeve of the hinge drill "Zenterfix" self-centers in the screw hole of the hinge or fitting, the Zenterfix is equipped with a spring-loaded guide sleeve and a core drill in HSS with a roof tip