GCOKTL
G Cobalt Palabolic Flute Taper Shank Long Drills
・Tool material：HSS-Co
・Surface Treatment：TiN coating
This is general coated long drill and is suitable for non-step drilling of deep holes.
GCONOS
G Cobalt Noss Drill
・Tool material：HSS-Co
・Surface Treatment：TiN coating
This drills made from cobalt HSS is used by Jacobs chucks at drillstand and power drills.