Yep, as kukuwai said. Need adjustment before you put them to work or you will be disappointed with sprung/escapes.
Adjust the plate nut so there is no side to side movement, should go straight up and down. Not to firm.
File end of dog smooth to eliminate machined edge, or will be to trippy.
Trap plate should activate whether set heavy or light with out catching spring levers... Are Ok traps just need tinkering with first.
More expensive types will/should be ready to go straight out of the box.
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