The present invention relates to a fastening device of the snow chain to increase the friction force on the tire to prevent the vehicle from sliding off the ice road in winter, and in particular, to operate the binding ring that can tighten the snow chain with the rack and pinion The present invention provides a fastening device for a snow chain comprising a combination of reduction gear groups that can be easily driven with a small force, rigid fixing means that do not naturally loosen after binding, and cushioning means that are not easily broken by the tension.;Binding structure of stop ring gear and handle teeth, rack gear and pinion gear, body and ring.
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