The Comstock traps are the most versatile, no limitations in how or where they may be set, right side up, upside down, sideways and even vertically if called for. The fast closing power doors with the wire trigger combination allow for this. They are just like a conibear in they that can be set in any manner. Because of the super solid locking system these traps do not require staking, anchoring or wiring. No amount of rolling or moving will make them open up or make it any easier for an animal to escape. They are basically escape proof. One trapper sent a video of a single door Comstock in a positive set at the base of a home. The coon first wrestled the trap away from the wall, rolled the trap over, then climbed in to get a small amount of bait when the trap was on it's side before firing the trap and getting caught. Unlike gravity or pan traps, the power doors provide the stability so that even when traps are moved or rolled they will most often still remain set and will still make a catch. Besides, coon, chucks and possum, when used with a metal nose cone cover the 9x11's work fine for skunks too. We have taken hundreds and they don't spray. The frames are super tough. A test was run on the frame of a 9x11 many years ago. It took 900 pounds of pressure before it was crushed.