They are used to take plastic clip.
We also produce other types of clip applier, please refer the link:
http://yuhuamedical.en.alibaba.com/product/60399545728-802511801/reuseable_metal_laparoscopy_clip_applier_for_taking_titanium_clip.html
We have shorter one, the working length is 200mm, it is used in small insicion operation, please refer the link:
http://yuhuamedical.en.alibaba.com/product/60404088297-802511801/small_incision_laparoscopy_medical_clip_applicator_for_taking_titanium_clip_with_applier.html
If you need special clip applier, please feel free to contact us, we could produce for you.