Small centre point, spur and 2 main cutting edges. The tool steel version for uncoated soft wood. The Bormax® geometry is used for coated boards and limited for plastic laminated chipboards or MDF. Carbide tipped version can be used without problems for plastic coated materials. All versions only limited suitable for freehand drilling. The Zenterfi x will centre itself in a screw hole of a fi tting or a hinge. The Zenterfi x is equipped with a guide bush incl. spring and a core drill HSS with roof tip.