Simpson 6 x 8 Column Base G90 Galvanized CB68 Slot Cutters eliminating the need for a eliminating the need for a fence and delivering consistent results without manual adjustment between passes rough bores rather than the clean holes required for dowel joinery Wind and seismic ready increased uplift resistance combined with code compliant bolt hole spacing means this column base is suited for projects in regions with strict wind or seismic design requirements Simpson 6 x 8 Column Base G90 Galvanized CB68 is a heavy duty post base engineered by Simpson to connect posts to concrete foundations across a wide range of lumber