These were a pain to remove! Took like 2 hours to get them all out. Bent a finishing nail at 45 degrees about 1/2" from the tip and took a grinder to make it a standard screwdriver. Used it on top from the outside through the hole and a small standard screwdriver from the bottom and pressed the tabs on the insert toward the middle. Slowly worked the insert out all of the way. Once removed, I found that by placing the small standard screwdriver into a groove in each tab of the retainer, it can be easily removed. The insert is the hard part, the rest is cake!