You can switch between Kurutoga mode and Hold mode , Core Diameter : 0., 5mm Mechanical Pencil Review: The Uni Kuru Toga Alpha Gel Switch - The Pencil Grips Uni Alpha Gel Switch 0.5mm Mechanical Pencil - Dark Green Writing Pencils Mechanical This limited edition mechanical pencil provides the Kurutoga rotating mechanic in a comfortable Alpha Gel grip section design. Two writing modes, including the Kuru Toga mode and Hold mode, can be switched between while you write with this pencil This time, we will switch between Kurutoga mode where the core turns and keeps toggling and Hold mode where stable writing feeling is used, and we will newly line up Uni Alpha Gel Switch that can be used according to the usage scene. Uni Alpha Gel Switch Mechanical Pencil - 0.5 mm - Black | JetPens Uni Alpha Gel Mechanical Pencil which concentration continues is a series that uses a soft and elastic gel material for the grip part.