The MB-450-OS 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 system with the night latched dog, heavy levers, music wire springs, crunch proof swivels, and a 2 piece gusseted frame for strength and reliability. The trap that the live catch market has been waiting for.