The Armaspec® Enhanced Pivot / Takedown Pin Set for AR-15, M16, M4 Rifles are made of titanium and feature a corrosion-resistant coating, and come with several enhancements for easy installation and operation. These pins feature a convex head so they can be tapped from any angle while an extended concave tip ensures easy removal using any flat or pointed object including a bullet tip and an EZ-Set hole for detent installation. Backed by a lifetime warranty. Made in USA.