The Ouell Ursus 1 was designed to put set on the ground. The spring throws a foot snare onto the bear once the bear steps on the pan and activates the spring. This trap spring is very powerful and should be handled with care.
The traps comes with the thrower and 1 Ouell foot snare designed for the thrower and setter tool. It is recommend that after every two captures the foot snare be replaced or if there is any sign of damage.