![](https://cdn.prod.website-files.com/65144f2ab86f0c7800beb8f9/65144f2ab86f0c7800bebb64_building-countryside-hut-nature-outdoors-rural-shack-shelter-diagram-t.jpeg)
Purpose
Used in conjunction with C1 / C2 Running Tools to collapse downward facing lock dogs in the running of selective “S” locks.
![](https://cdn.prod.website-files.com/65144f2ab86f0c7800beb8f9/65144f2ab86f0c7800bebb66_3107b408-1223-4890-a7f6-f07e462fc29a.png)
![](https://cdn.prod.website-files.com/65144f2ab86f0c7800beb8f9/652474bb5e47ec3da219c3b4_A%20Shank.jpg)
Used in conjunction with C1 / C2 Running Tools to collapse downward facing lock dogs in the running of selective “S” locks.