Minnesota Brand 550 Rubber Jaw traps have an outside jaw spread of 5 3/4 and an inside jaw spread of 4 5/8. The padded jaw face is 1/2 thick. They have installed a Paws-I-Trip pan system and stainless steel night latch dog. Pan tension out of the box on the two coiled version runs an average of 2.5 pounds which we have found to be effective number for a multi species trap. Pan tension on the four coiled model runs an average of 4.1 pounds. Waxing will decrease pan tension by about .3 pounds. This trap is fast and excellent results are obtained using it two coiled. We do not recommend using the 4-coiled version if grey fox is your target animal. #3 chain, crunch proof swivels, and a 2-piece gusseted frame for strength and reliability. The 550 is an excellent live market trap, as well as the trap to use on a mixed specie line. Small enough for fox and tough enough for coyote.