Pivot and takedown pins with easy to grasp, oversized heads make separating upper and lower receiver halves quick and easy. Grasp the large, button-style head and disengage the pin. Pin shafts are designed to lock as securely as factory pins. Perfect for the shooter who mounts different top ends for different applications on a single lower receiver. Precision machined, heat-hardened steel with long-wearing mil-spec Parkerized finish.