The cross chain hook is typically a metal hook or fastening mechanism that connects the cross chains of the tire chains. Cross chains are the diagonal or horizontal chains that span across the tire tread and provide traction. The hook is positioned over the cross chains and secured in place, helping to maintain their position and alignment.

By connecting the cross chains together with hooks, the tire chains can effectively grip the tire surface and provide improved traction in snowy, icy, or slippery road conditions. The hooks ensure that the chains stay in place and maintain their intended configuration, maximizing their effectiveness and minimizing the risk of damage or dislodgment.

It's worth noting that not all types of tire chains require cross chain hooks. Some chains have integrated or welded cross chains that do not require separate hook attachments. The use of cross chain hooks depends on the specific design and manufacturer's recommendations for the tire chains being used.

When installing or using tire chains with cross chain hooks, it is important to carefully follow the manufacturer's instructions to ensure proper installation and secure attachment. This will help ensure optimal performance and safety when driving in challenging winter conditions.