Abstract: To fasten snow chains to vehicle wheels, an adapter device (100; 200; 300; 400) is used that can be fastened to at least one wheel bolt and comprises a body that is constructed to be connected to connection and installation elements of the snow chains. The adapter device comprises at least one magnet (120; 403) connected to its body which is applied to the head (130) of at least one wheel mounting bolt, so as to retain the body of the adapter device on the wheel by means of magnetic retention.

Abstract: A description is given of an insertion device for snow chains, comprising a base (2) designed to be rested on the ground, and two lateral walls (3) which rise up from the base to form a channel for insertion of the internal ring (15) of a snow chain, in such a way that the internal ring (15) of the snow chain can be made to pass behind the wheel of the vehicle.

Abstract: A description is given of an insertion device for snow chains, comprising a base (2) designed to be rested on the ground, and two lateral walls (3) which rise up from the base to form a channel for insertion of the internal ring (15) of a snow chain, in such a way that the internal ring (15) of the snow chain can be made to pass behind the wheel of the vehicle.

Abstract: A releasing device for snow chains comprising an inner side portion (2) closable as a ring, suitable to be placed on an inner part of a tire (3), an outer side portion (4) suitable to be placed on an outer part of the tire (3), said portions being joined by variously composed elements (5) creating the tread traction, the releasing device comprising a closing device (8), for closure as a ring of the inner side portion (2) and an operating device (50), that can be operated by the user from the outside of the tire to open the closing device (8), the operating device (50) comprising protective members (53, 55) suitable to make it more stable and the closing device (8) being able to be opened manually even without the aid of the operating device.