Pentel Ain Stein Mechanical Refill Leads - for Automatic/Mechanical Pencils - in Pentel Pillow Packaging (0.5mm H, Pack of 3)

The Ain Stein leads feature a new formula that provides dramatic strength without sacrificing darkness or smoothness. These leads are about 10% stronger than existing Pentel leads thanks to a ceramic cell structure. Comes in a unique oval shaped tube with a convenient swivel top lid perfect for keeping your leads secure. Suitable for not only for general writing but also drafting, these leads can be used with all Pentel automatic pencils.