When installing stuff in an HP rack or another rack that uses those pop-in pem nuts in the square rack holes, don’t waste time and beat up your hands trying to pinch the pem nut tabs into the holes. That little flat piece of metal they put in the bag is a mini crowbar. Just put the bottom tab of the pem nut in the hole, catch the top with the lip of the crowbar thing, and lever it in. Fast, easy, and saves your fingers.