The MB-450-FOX version has all of the features of the 450-FH except lighter. 125 diameter American made music wire springs and 3 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 chain, crunch proof swivels, and a 2 piece gusseted frame for strength and reliability.