Dental Angled Implant Screwdriver Angulated Screw Channel Driver Hiossen/ITI/NOB por | Jul 19, 20261.2 ASC for HIOSSEN OSSTEM. Angulated screw channel solutions. The angulated screw channel (ASC) gives you the option to place the screw access hole anywhere between 0° to 25° in a 360° radius. T6 ASC for ITI Strumann.