A pull-through security includes a base body and a tongue that protrudes therefrom and can be inserted through a pull-through opening that is arranged in a housing component connected to the base body. A restraint inset is arranged in the housing component. The tongue is provided with toes which protrude towards the outside in a rectangular-shaped manner when seen in the cross section. The toes engage with hooks in a toothed manner, whereby the hooks are arranged in the restraint inset. The housing component is provided with an outlet. The cross section of the outlet matches the cross section of the tongue having the toes. The form practically prevents the hooks from being manipulated by simple, flat tools. Influence or manipulation of the toothing between the toes and the hooks can practically be excluded.