# Extrude not working

**URL:** <https://discourse.shapr3d.com/t/extrude-not-working/28972>\
**Category:** Modeling Questions\
**Created:** [November 18, 2023, 8:14pm UTC](https://discourse.shapr3d.com/t/extrude-not-working/28972 "2023-11-18T20:14:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Mark290](https://avatars.discourse-cdn.com/v4/letter/m/2acd7d/32.png) [@Mark290](https://discourse.shapr3d.com/u/Mark290)\
**Post date:** [November 18, 2023, 8:14pm UTC](https://discourse.shapr3d.com/t/extrude-not-working/28972/1 "2023-11-18T20:14:23Z")

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I have a very simple project that has completely baffled me. An 85X85X20 box. I need round holes 4mm wide going straight thru and holes on the 3 surfaces for concentric circles of 9mm. I am having all kinds of trouble extending the 4mm holes thru the body. I cannot specify a length. I input -85 and execute and the window will show 15.1mm. If I drag the arrow, it will disregard my pull, unless it is under a certain distance. I am about to redo the whole project to see if I have tripped some preference that is stopping me. Thanks for any help

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**Author:** ![Bob3DPO](https://avatars.discourse-cdn.com/v4/letter/b/7993a0/32.png) [@Bob3DPO](https://discourse.shapr3d.com/u/Bob3DPO)\
**Post date:** [November 18, 2023, 10:24pm UTC](https://discourse.shapr3d.com/t/extrude-not-working/28972/2 "2023-11-18T22:24:42Z")

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Hi Mark,  
Can you atttach a screenshot?