The Egg Traps are coon catchers when you use and handle them properly - just like any other trap system. Many, many trappers and ADC folks use this tool consistently to catch raccoon and resolve nuisance animal complaints. The Egg trap is a tool for a trappers tool box. You have to know what you're doing with the equipment and be able to adapt to the ever changing habits of raccoon. It's a high quality tool that allows you to sleep at night knowing it won't get you in trouble by a non-target catch. Yep, it needs a plate holder and setting tool to make setting/un-setting the tool an efficient process. I'm not sure where you ordered them from, but if you would like some help in getting started the right way, let me know. You can check things out " on the web" and you might inquire about an "Egg Trapping Basics" video too.
Have fun out there! Catch 'ya, Rick