This pen has refill built into barrel, eliminating the risk of tampering. Features rubberized grip and ridges for writing comfort. Round, adhesive base secures to any clean, flat surface. Ball-chain extends to 24" for maximum desk coverage. Pen snaps onto the chain as a quick and easy alternative to refilling ink. Replacement Pen. Special Ink Type: N/A; Pen Style: Counter; Ink Color(s): Black; Pen Type: Ballpoint.