Keensert wedges

What are the wedges sticking out?

After screwing the clinsert (by hand or with a tool) until the pins reach the upper surface of the material. Depending on the size of the clinsert, such will have 2 or 4 wedges.

The next step is to drive/tap the pins into the parent material the with the installation tool.

https://www.youtube.com/watch?v=rxQjcA-KglA

The pre-assembled wedges, once installed provide with a positive mechanical lock that acts against rotation and vibration.