Balanced performance
The items that conflicted to the likes of "smoothness", "break-resistant" and "stain resistant" are both in high dimensions. "Pentetl Ain" is smoother than conventional products. New manufacturing process, smooth and smooth.
The new formula uses a special oil for raw materials, which makes graphite and resin carbide smooth when writing, resulting in a smooth writing experience. Case construction for ease of use
The case construction has been repeatedly researched and behavior. One hand operation with the case facing upwards reduces the risk of lead spilling.