I would not use them unless required by law. Some are so flimsy 50% of the coyotes will escape, teaching them to avoid scents and traps. A steel laminated trap is far superior, less movement of the paw. With rubber jaws there is movement, swelling and skin damage, if it holds them. About 3/4ths of my catches still have dirt pressed into the fur of the paw, this means no movement, no damage, usually.