These are #1 1/2 size, but built to hold bobcats and coyotes. The inside jaw spread is 4 3/8", the outside spread is 5". These traps feature 5/16" thick cast jaws, Paws I Trip pan system, and a night-latched dog. They also have American made music wire springs, crunch proof swivels and and #2 US chain. Regular jaws.