long version, carbide-tipped with center point, 2 main cutting edges and 2 pre-cutting edges, perfect CNC diamond grinding, professional service life thanks to high-quality carbide tipping, from ø 42 mm with hexagonal shank, the special asymmetrical serrated edge (from ø 25 mm) on the main cutting edge makes it much easier to penetrate the materials to be processed, especially plastic-coated materials, clean, tear-free holes in all hardwoods, coated and KS-coated chipboard and many plastics such as acrylic Plexiglas, Corian®, GRP, HPL coating, polycarbonate, PVC and Trespa®, only recommended for stationary use, for freehand use in European hardwoods we recommend the long, fast Forstner bit Bormax® WS prima, long 1614