I recently picked up a Twsbi Kai, but I noticed that the section where you grip the pen is loose. It wiggles, and I am not sure how to fix this problem?

Couldn't help myself, purchased a TWSBI : r/fountainpens

review – Hand Over That Pen

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TWSBI KAI Limited Edition Fountain Pen

review – Hand Over That Pen

Piston Filler Type fountain pen. Simply twist the end knob open and closed to fill the pen with ink. Acrylic cap, grip, body, end cap. RoseGold nib,

TWSBI Kai Fountain Pen

Unboxing One of the Most Anticipated Pens of 2023 - Twsbi Limited