The MB-450-FOX version has all of the features of the 450-FH except lighter. 125 diameter American made music wire springs and three crunch proof swivels in the chain instead of two. The FOX version was built upon request from some of the nations top fox men. It is a #1 1/2 size trap, but built to hold the meanest, nastiest coyote. Outside jaw spread is 5" and inside jaw spread 4 3/8". The 450 has 5/16 thick, smooth closed cast jaws. Features include a Paws-I-Trip Pan with night latched dog heavy levers, #2 American made a chain, crunch proof swivels, and a two piece gusseted frame for strength and reliability.