The plastic pieces have a cut in them. They pry off pretty easily. I'm using OEM steelie lugs on factory alloys also. No problems here. It's a good thing they worked because I couldn't find anyone around here selling the proper lug taper besides the dealer. Everything in the auto parts stores were a conical taper. I also had to go factory to get locking lugs, too. Fortunately I got 'em a little cheaper than the dealer.