The "Advanced Upgrade Model" features a sharp "Advance" that allows you to write clean text, with a W-speed engine that rotates and toggles every time you write, finely crafted metal parts, a pipe slide mechanism to prevent lead breakage during writing, and a stylish punching grip with a design Feature 1: Precision metal processing punching grip for a smooth grip. The high-class metal tip with a precision punched finish has a punch hole on the grip and serves as a guide for your grip when writing. The punch hole on the tip and the seam of the nozzle is not snagged, and the axis is paint on the finger for a smooth grip. Feature 2: The low center of gravity design with a sense of stability and a smart design overflowing with luxury. The tip axis and ferrule are made of metal parts, and the design is stable and low center of gravity design. The tip is slightly rounded to fit your hand when hold. The rear axis is is extremely slim and has a smart impression. Until now, the sharp design with automatic core rotation mechanism allows you to see the movement of the mechanism, but this time it does not see the movement of the W speed engine and the shaft design is designed to emphasize the stability and luxury of metal parts. Product Name: Mitsubishi Pencil Mechanical Pencil Kurutoga Advanced Upgrade Model 0.3 Black M310301P.24