I haven't used traps at all. Before I use them. I have to contact iowa dnr to customize the traps to have at a minimum of 7 1/2 inch hole in back of trap in irder to let smaller turtles and fish to escape the trap . The escape hole has to be below the water line. So I have to make them into a floating trap somehow. But, I received your traps in a good condition. Thankyou.