Features: Black PVD finished titanium construction. 0.79" ball diameter riding on a double bearing system. Wide, textured grip. Magnetic bit attachment. Description: This Knife Tool from Audacious Concept has a simple yet rugged design to excellently perform any knife maintenance you may need. It comes ready in a plastic carry tube and is small and compact to fit in any bag, pocket, tool kit or glove box. The magnetic bit holder is strong and makes it easy to swap out the parts you need.