Amazon.co.jp: BLICK PREMIER Precision Double Knock Drafting Mechanical Pencil (0.5) High Precision Double Knock + Cushion Mechanism, Mechanical Pencil, Made in Japan : Office Products
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Amazon.co.jp: Kokuyo ProtecXin Cushioning Drafting Mechanical Pencil for Drafting Cushion Mechanism, Made in Japan, Red, Metal Grip (Knurled) : Office Products
Blick Premier double knock review : r/mechanicalpencils