The Operator BS+G2 is the face of the TC52 Phone Holster attachments and the reason for the name BS+G2 is that it holds and locks in 1x Pilot G-2 05 Pen and up to 12 business cards. Other pens and markers may fit but won't lock in as well as the G2 series.
The Business Card holder comes with an exclusive Nordic Tactics Pen, 2x screws, 2x rubber gaskets and 2x posts