PENCIL,MECH,SIDE CLK,0.5,BK Sold as 12/DZ. SlickerClicker Side-Advanced Mechanical Pencil features a sliding sleeve that protects the lead to provide an extended writing cycle. Both grip and eraser are made using latex-free rubber to minimize allergic reactions. The low-profile side button allows you to advance the lead without changing writing position. Design also features a translucent barrel, rubber grip for added writing comfort and a clip to attach to pockets and notebooks.