Unique design has refill built into barrel, eliminating the risk of tampering and rendering the pen unusable. Antimicrobial additive acts as a stabilizer against microorganisms that attach to the pen`s surface. Rubberized grip provides exceptional writing comfort. Replacement pen snaps easily onto chain. 24" chain holds pen to its self-adhesive base for superior safety. Pen Type: Ballpoint; Special Ink Type: N/A; Pen Style: Counter; Ink Color(s): Black.