2 day shipping? nah. right now shipping. These take about 20-30 minutes to print and you can make however many you need instead of buying a pack of 50. The holes on my panels measured 9mm and the clips fit really nice. They can be printed with no supports but I do recommend using a ton of walls. These clips aren't the strongest but neither are the factory ones. These are just much easier to make and replace when needed. 1 clip is about 1.8g of material when printed solid.