The guide pipe of the TWSBI Precision 0.5 is fixed. I purchased it used and used it for a while, but it didn't suit me, so I'm selling it. There is a small line next to the "0.5" marking. Please refrain from purchasing if you are sensitive to the condition, as it has been stored by a private individual. Returns are not accepted. - Brand: TWSBI - Model: Precision 0.5 - Color: Black - Type: Mechanical Pencil Thank you for viewing.