AR15 Rear Takedown Pin Machined in house using high quality steel Black Oxide coating for Corrosion and Wear Resistance Machined hole allows user to add a key-ring if desired Eliminates the need to push takedown pins out using your finger or tool/ bullet tip Quick Pull Design- Allows the user to pull the pin in order to take down instead of pushing it out Great for shooters who swap upper receivers between lowers often, or prefer a hassle free and quicker way to take down their AR. Key-ring not included