Drive Bit to suit Threaded Inserts 8mmAF Hex Drive Miami Stainless high quality Sutton Hex Drive Bits allow for easy installation of Threaded Inserts. Threaded Inserts revolutionise traditional timber post stainless steel wire balustrade systems.  Check out ProRig Original Design Insert Swage Stud System™ or ProRig Original Design Insert Tension Rod System™ for an easy to install, streamline stainless steel wire balustrade solution.   Code Size Drive   SBIT-HX6 6mm AF Hex   SBIT-HX8 8mm AF Hex   All sizes in millimetres (mm)