E10 and E10BP: For Twist Erase and Side FX Pencils. PDE-1 and PDE1BP-K6: For Carnival, Champ, Clarius, Click-it, e-Click, e-Sharp, EZ#2, Fiesta, Forte, Forte Pro, Icy, Planetz, Quicker Clicker, and Techniclick Pencils. Z3-1: For Cushi, Gizmo, Hotshots, Sharp, Kerry, and Technica-X Pencils. Z2-1 and Z21BP: For more than 30 Pentel mechanical pencils.