The Kwikset Deadbolt Plug Clip ("E" clip) is designed to be used on all Kwikset Pin and Tumbler deadbolt products. This plug clip is what holds the cylinder plug in the cylinder housing. These are factory original plug retainer clips.
BRAND NEW, sealed in bag from manufacturer.
The second picture shows where it goes. Cylinder is not included, it is used for reference only.
Any questions please ask.