The tip sleeve retracts fully when not in use

or small fills

But that is not all

and an internal spring cushion adds further protection

uni pin fine line pen black Size:0.05 The tip sleeve retracts fullyThe Uni Pin Fine Line Black is a technical fineliner sold individually across 14 line widths, from an ultra fine 0. 03 mm needle point up to a 1. 03. 0 mm chisel tip, covering everything from microscopic detail work to broad lettering strokes within one product line. The tip is a polyacetal core inside an extended steel needle guide sleeve, which keeps the nib protected and makes it easy to track straight along a ruler, stencil, or drafting template