Schuster Mfg. Inc Pin Pushers are made to easily remove your trigger pins, and your upper receiver pivot pins. Just align the pusher square with your pins and push them through (for stubborn pins a small brass hammer may be used). Pushers are made with a built in stop so you can't push the pivot pin detent through the receiver causing serious and unrepairable damage to your lower. Made of high quality Delryn Plastic.