Black Widow Stands are designed to stabilize beaver size traps. They fit on TS85, MB-750, Bridger 5, Duke 4, Duke 850, KO Beaver Extreme, The stand can be used horizontally or vertically into the side of a bank, where bedding a trap would be more difficult due to a steep drop off.
Here is video link for the stands: https://www.youtube.com/watch?v=iD7GuAclHYE