# extract eskeleton in STL

**URL:** <https://discourse.slicer.org/t/extract-eskeleton-in-stl/5447>\
**Category:** Support\
**Created:** [January 21, 2019, 4:16pm UTC](https://discourse.slicer.org/t/extract-eskeleton-in-stl/5447 "2019-01-21T16:16:44Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ramon](https://avatars.discourse-cdn.com/v4/letter/r/34f0e0/32.png) [@ramon](https://discourse.slicer.org/u/ramon)\
**Post date:** [January 21, 2019, 4:16pm UTC](https://discourse.slicer.org/t/extract-eskeleton-in-stl/5447/1 "2019-01-21T16:16:44Z")

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I have an .stl surface and I want to extract its skeleton curve. I am trying to use the tool “extract skeleton” but only works with volumes. someone know how to I can do?