# Shell tool question

**URL:** <https://discourse.shapr3d.com/t/shell-tool-question/2163>\
**Category:** Modeling Questions\
**Created:** [March 20, 2018, 2:29pm UTC](https://discourse.shapr3d.com/t/shell-tool-question/2163 "2018-03-20T14:29:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Lue](https://avatars.discourse-cdn.com/v4/letter/l/c5a1d2/32.png) [@Lue](https://discourse.shapr3d.com/u/Lue)\
**Post date:** [March 20, 2018, 2:29pm UTC](https://discourse.shapr3d.com/t/shell-tool-question/2163/1 "2018-03-20T14:29:41Z")

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![image](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/2X/2/2ad278a33318e320bbe134fd72bf9af16a83f1b8.jpg) ![image](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/2X/b/b3d25c2e7f2b99c98051e294e56ab1328d398e1f.jpg)

I made 3 sketches.But only the circle could work under shell tool. Any constraints on tool application?

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**Author:** ![Koko\_Shapr3D](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/koko_shapr3d/32/1703_2.png) [@Koko\_Shapr3D](https://discourse.shapr3d.com/u/Koko_Shapr3D)\
**Post date:** [March 20, 2018, 2:42pm UTC](https://discourse.shapr3d.com/t/shell-tool-question/2163/2 "2018-03-20T14:42:25Z")

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You should try it with a smaller thickness. It works for me:  
 ![IMG_82458B0A7431-1](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/2X/8/8cf4266b71614ee6b69ca2ed619c2e22c4f95a82.jpeg)

By the way, you can check the maximum possible thickness with the offset tool (you can drag the edge until the maximum allowed thickness is reached):  
 ![IMG_FAFE93D89AC1-1](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/2X/1/1dc84e3f88d8db7af8e72244e913a90266a771aa.jpeg)

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<div class="post-metadata">

**Author:** ![Lue](https://avatars.discourse-cdn.com/v4/letter/l/c5a1d2/32.png) [@Lue](https://discourse.shapr3d.com/u/Lue)\
**Post date:** [March 20, 2018, 3:23pm UTC](https://discourse.shapr3d.com/t/shell-tool-question/2163/3 "2018-03-20T15:23:20Z")

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Thank you for fast reply.