A device embodiment comprises a fishing rod; a regular and additional reel rotatable by a handle; a mechanism including a ratchet wheel, a string-lever rotatable about a lever axis, a spring-lever rotatable about the lever axis connecting the levers, an orifice in the string-lever, a tongue fixed on the string-lever, a spring attached to the spring-lever remotely to the tongue, a regulative means to vary dispositions between the levers, spring, and string; wherein all the mechanism's elements are so configured that tend to disengage the tongue from the wheel's teeth; a string woundable on the additional reel by revolving the handle and tied to the rod's free end, which string is threaded through the orifice so that capable to engage the tongue with the wheel's teeth while said string being stretched between the additional reel and the rod's free end. Other embodiments may be modified for traps, anti-theft, alarm systems.