Convert any Comstock 9x11 trap into a positive set trap with flush mount adapters. These trap extensions guide animals directly from a den opening into a trap. When a trap is set with the door open, the door extends a few inches past the trap frame which prevents it from being flush mounted. However, flush mount adapters extend the length of the trap past the open door, allowing the trap to be mounted flush against a wall or any other structure. To use, place the flush mount adapter in position against a wall and over the animals den opening. Then bait and set your trap and slide it into the other end of the flush mount adapter.